Much if not most recent literature in philosophy of biology concerns the extent to which biological theories conform to what is known as the "received" philosophical view of scientific theories, a descendant of the logical-empiricist view of theories. But the received view currently faces a competitor--a very different view of theories known as the "semantic" view. It is argued here that the semantic view is more sensitive to the nature and limitations of evolutionary (...) theory than is the received view. In particular, the semantic view better accomodates the fact that evolutionary theory is bound to change as a result of the evolutionary process itself. This unusual feature of evolutionary theory provides a good reason for reconsidering the received view and paying close attention to the semantic view. (shrink)

In this work, I attempt to develop what I call a co-evolutionary model of scientific change, which I expect to afford a more balanced view on both the continuous and discontinuous aspects of scientific change. Supposing that scientific goals, methods and theories constitute the main components of scientific inquiry, I focus on the relationships among these components and their changing patterns. First of all, I identify explanatory power and empirical adequacy as primary goals of science and (...) explore the possibility of evaluating scientific goals. Then I try to bring out the major features of how the main components of science are related to each other. One major feature is that they mutually constrain each other, and as such each main component operates as a selective force on the other components. Another major feature is that the main components of science induce changes reciprocally, but with certain intervals. Other important features are the modes and tempos of changes in the main components of scientific inquiry. All these features together, I conclude, suggest that scientific change is evolutionary, as well as co-evolutionary. Finally I argue that this co-evolutionary model of scientific change does not yield to what I call the problems of circularity and scientific progress. (shrink)

Despite considerable interest in viral evolution, at least among virologists, viruses are rarely considered from the same evolutionary vantage point as other organisms. Early work of necessity emphasized phenotype and phenotypic variation (and therefore arguably was more oriented towards the broader biological and ecological perspectives). More recent work (essentially since the development of molecular evolution in the 1960's but beginning earlier) has concentrated on genotypic variation, with less clarity about the significance of such variations. Other aspects of evolutionary (...) theory, especially considerations of natural selection and of evolutionary constraints, have not widely been applied to viruses, and an evolutionary framework for virology has long been lacking. This becomes apparent in considering 'emerging' viruses, which have often been treated on an ad hoc basis. It was often felt that, because previously unrecognized viruses are involved, mechanisms of viral emergence must mirror the unpredictability of mutations in the viral genome. However, most examples of viral emergence are independent of mutation, at least initially, and are often pre-existing viruses in changed circumstances ('viral traffic'). This conclusion also readily follows from ordinary Darwinian premises, which would require that, like other living species, 'new' organisms are descended only from existing species. In this respect, from a Darwinian perspective, viruses would appear to resemble other organisms. (shrink)

Most of the issues in the philosophy of mind were formulated long before Charles Darwin produced a scientific theory of biological evolution. That theory had an immediate impact on issues in many areas. But on the philosophy of mind its impact was delayed, and discussions continued for some time as though Darwin had never existed. Even today this is largely true. Yet a theory whose consequences are so far-reaching, and which has radically altered ideas about living things, (...) was bound, sooner or later, to affect discussions of mental phenomena. The pragmatists were the first group of philosophers to work out in detail a philosophy of mind based on evolutionary principles. Moreover, since they were familiar with classical ideas in the field, they were able to assess the kinds of changes in those ideas which evolutionary principles required. My aim in this paper is to review the main features of their enterprise, and to offer some assessment of it. (shrink)

"Advocates of the evolutionary analogy claim that mechanisms governing scientific change are analogous to those at work in organic evolution - above all, natural selection. By referring to the works of the most influential proponents of evolutionary analogies (Toulmin, Campbell, Hull and, most notably, Kuhn) the authors discuss whether and to what extent their use of the analogy is appropriate. A careful and often illuminating perusal of the theoretical scope of the terms employed, as well as of (...) the varying contexts within which the analogy is appealed to in contemporary debates, leads to the conclusion that such general theories of selective processes are either too sketchy or eventually not persuasive, if not altogether based on flawed views of evolutionary biology. By clarifying what is at stake, the analysis carried out in the book sheds new light on one of the dominant theories of scientific progress. It also invites criticism, of course - but that is the very fuel of philosophical confrontation." - Stefano Gattei, IMT Institute for Advanced Studies, Lucca "This book presents a serious challenge to those, like David Hull, who seek to model scientific change as an evolutionary process. The authors point out that although there are similarities between the processes of scientific change and organic evolution, the dissimilarities present formidable difficulties to construing the relation as anything more than a weak analogy. Their argument employs what they call a 'type hierarchical' approach that promises to be a powerful tool for the classification of similarities between theories in all fields." - Michael Bradie, Department of Philosophy, Bowling Green State University "This is a most interesting discussion of the analogy between biological and scientific change. Particularly commendable is the close attention paid to the thinking of the late David Hull and his pathbreaking work on this issue." - Michael Ruse, History and Philosophy of Science, Florida State University. (shrink)

It has always been an important task of economics to assess individual and social welfare. The traditional approach has assumed that the measuring rod for welfare is the satisfaction of the individual’s given and unchanging preferences, but recent work in behavioural economics has called this into question by pointing out the inconsistencies and context-dependencies of human behaviour. When preferences are no longer consistent, we have to ask whether a different measure for individual welfare can, and should, be found. This book (...) goes beyond the level of preference and instead considers whether a hedonistic view of welfare represents a viable alternative, and what its normative implications are. Offering a welfare theory with stronger behavioural and evolutionary foundations, Binder follows a naturalistic methodology to examine the foundations of welfare, connecting the concept with a dynamic theory of preference learning, and providing a more realistic account of human behaviour. This book will be of interest to researchers and those working in the fields of welfare economics, behavioural and evolutionary economics. (shrink)

It is widely recognised that mainstream economics has failed to translate micro consistently into macro economics and to provide endogenous explanations for the continual changes in the economic system. Since the early 1980s, a growing number of economists have been trying to provide answers to these two key questions by applying an evolutionary approach. This new departure has yielded a rich literature with enormous variety, but the unifying principles connecting the various ideas and views presented are, as yet, not (...) apparent. This 2005 volume brings together fifteen original articles from scholars - each of whom has made a significant contribution to the field - in their common effort to reconstruct economics as an evolutionary science. Using meso economics as an analytical entity to bridge micro and macro economics as well as static and dynamic realms, a unified economic theory emerges. (shrink)

The paper presents an example of unified theory bearing interest from both a historical and systematic point of view. The example is chosen from evolutionary population genetics (neo-Darwinian synthetic theory). It exhibits various aspects of theoretical change in science that have been shown in Part I (Geiger, 1988) to be characteristic of syntheses of theories.

Homology is a fundamental concept in biology. However, the metaphysical status of homology, especially whether a homolog is a part of an individual or a member of a natural kind, is still a matter of intense debate. The proponents of the individuality view of homology criticize the natural kind view of homology by pointing out that homologs are subject to evolutionary transformation, and natural kinds do not change in the evolutionary process. Conversely, some proponents of (...) the natural kind view of homology argue that a homolog can be construed both as a part of an individual and a member of a natural kind. They adopt the Homeostatic Property Cluster theory of natural kinds, and the theory seems to strongly support their construal. Note that this construal implies the acceptance of essentialism. However, looking back on the history of the concept of homology, we should not overlook the fact that the individuality view was proposed to reject the essentialist interpretation of homology. Moreover, the essentialist notions of natural kinds can, in our view, mislead biologists about the phenomena of homology. Consequently, we need a non-essentialist view of homology, which we name the “persistently reproducible module” view. This view highlights both the individual-like and kind-like aspects of homologs while stripping down both essentialist and anti-essentialist interpretations of homology. In this article, we articulate the PRM view of homology and explain why it is recommended over the other two views. (shrink)

The paper presents an example of unified theory bearing interest from both a historical and systematic point of view. The example is chosen from evolutionary population genetics (neo-Darwinian synthetic theory). It exhibits various aspects of theoretical change in science that have been shown in Part I (Geiger, 1988) to be characteristic of syntheses of theories.

The claim that conceptual systems change is a platitude. That our conceptual systems are theory-laden is no less platitudinous. Given evolutionary theory, biologists are led to divide up the living world into genes, organisms, species, etc. in a particular way. No theory-neutral individuation of individuals or partitioning of these individuals into natural kinds is possible. Parallel observations should hold for philosophical theories about scientific theories. In this paper I summarize a theory of scientific (...) class='Hi'>change which I set out in considerable detail in a book that I shall publish in the near future. Just as few scientists were willing to entertain the view that species evolve in the absence of a mechanism capable of explaining this change, so philosophers should be just as reticent about accepting a parallel view of conceptual systems in science evolving in the absence of a mechanism to explain this evolution. In this paper I set out such a mechanism. One reason that this task has seemed so formidable in the past is that we have all construed conceptual systems inappropriately. If we are to understand the evolution of conceptual systems in science, we must interpret them as forming lineages related by descent. In my theory, the notion of a family resemblance is taken literally, not metaphorically. In my book, I set out data to show that the mechanism which I propose is actually operative. In this paper, such data is assumed. (shrink)

Long-term vegetation dynamics based on paleo-pollen data display transient behaviour, often alternating in phase between predominant determinism and predominant 'turbulence', when viewed as a trajectory in a multivariate phase space. Given this, the metaphor of vegetation dynamics as a 'flowing stream', first introduced by Cooper in his classic 1926 paper entitled "The fundamentals of vegetation change", is re-examined and revealed to be not only useful, but strikingly realistic. Vegetation dynamic theory is reviewed and classic theories are found to (...) reflect reality poorly. It is suggested that vegetation dynamics is a far from equilibrium system, and that the application of nonequilibrium thermodynamic theory is appropriate. (shrink)

In this book Ron Amundson examines two hundred years of scientific views on the evolution-development relationship from the perspective of evolutionary developmental biology. This perspective challenges several popular views about the history of evolutionary thought by claiming that many earlier authors had made history come out right for the Evolutionary Synthesis. The book starts with a revised history of nineteenth-century evolutionary thought. It then investigates how development became irrelevant with the Evolutionary Synthesis. It concludes with (...) an examination of the contrasts that persist between mainstream evolutionary theory and evo-devo. This book will appeal to students and professionals in the philosophy and history of science, and biology. (shrink)

Intuitive theories are sets of integrated concepts and causal laws that people adopt to comprehend, explain, and predict certain phenomena they encounter in the world. These theories are ‘intuitive’ because they are thought to drive our intuitions about how the physical and biological world, the mental life of people, and the society we live in work, without meeting the standards of explicit scientific theorizing. The proposal that people adopt such theories has been around at least since the 1970s. However, how (...) psychologists think about intuitive theories has been changing since they have been first proposed. In this chapter, we provide a short overview of the approaches to the function of intuitive theories and belief-forming systems more generally. While early characterization of intuitive theories emphasized their epistemic function, later attempts took an evolutionary view, claiming that they serve adaptive functions that are not always aligned with the goal of accurately tracking environmental states. A recent twist in this story is the proposal that shared intuitive theories may also serve social functions by providing a ‘theoretical common ground’ on which people interpret unobservable entities, such as memories, character traits, entitlements, and obligations. Such shared theories might be essential for social coordination via communication. (shrink)

This paper shows the relevance of an evolutionary model for the study of language change. We focus on a cognitive and usage-based approach to language change, namely the Theory of Utterance Selection developed by Croft (2000). Croft's evolutionary approach takes its inspiration from neo-Darwinian evolutionary theory, particularly the Generalized Theory of Selection developed by Hull (1988), a philosopher of science. Language is viewed as a system of use governed by convention, and language (...) change results from breaking with convention and propagating this innovation through the linguistic community until it becomes a new convention. Crucially, altered replication can be equated with language innovation, and propagation of individual changes is the linguistic counterpart of the differential perpetuation or selection of replicators. We will argue within the framework of Cognitive Linguistics (Geeraerts & Cuyckens, 2007) for a more systematic integration of cognitive and social factors in the explanation of language change. The mechanisms for language innovation are cognitive, as the pnnciples of cognitive efficiency like prototypicality constitute the main motivations for language change and metaphor and metonymy the main cognitive mechanisms of semantic change. The mechanisms for propagation are essentially social, including processes such as accommodation, identity and prestige. All of these mechanisms occur in individual communicative acts and operate like an "invisible hand" (Keller, 1994). We illustrate the sociocognitive evolutionary model of language change with some case studies on semantic change in Portuguese. (shrink)

Scientific thought is characterized in general as methodical and rational. I would like to present here an opposing view which treats science as a non-systematic activity, where serendipity, tinkering and imitation, rather than so-called rational thought, characterizes it. All these kinds of acts, which are considered to be a-rational, are related to an evolutionary view of science. I will deal here with a version of evolutionary epistemology as applied to science, integrated with the concept uf "meme". (...) Richard Dawkins, who coined the term "meme", treats memes as units of information which propagate in the meme-pool by leaping from brain to brain. The way that memes replicate is through imitation. Examples for this phenomenon in science are illustrated by some historical cases. In particular, I will deal with the evolution of theories of "internal symmetries" in particle physics. Memetics is the counterpart of genetics in the cultural arena. In its application to science, it deals with the manner memes/ideas spread in scientific communities. (shrink)

This book discusses political change in the view of Confucian thought. This study focuses on the Book of Change, which is one of the nine basic books of Confucius School, and has dominated oriental thought in this field for more than three thousand years.

Scientific thought is generally characterized as methodical and rational. I would like to present here an opposing view which treats science as a non-systematic activity, where serendipity, tinkering and imitation, rather than so-called rational thought, characterizes it. All these kinds of acts, which are considered to be a-rational, are related to an evolutionary view of science. I will deal here with a version of evolutionary epistemology as applied to science. The combination of variation and competition for (...) survival is analogous to the elements of Darwinian evolution. I will give some examples for this phenomenon in science from historical cases and Examples for this phenomenon in science are illustrated by some historical cases, in particular by the evolution of theories of internal symmetries in particle physics. (shrink)

The major tenets of the recent hypothesis of punctuated equilibrium are explicit in Darwin's writing. His notes from 1837–1838 contain references to stasis and rapid change. In the first edition of the Origin (1859), Darwin described the importance of isolation of local varieties in the process of speciation. His views on the tempo of speciation were influenced by Hugh Falconer and also, perhaps, by Edward Suess (1831–1914). It is paradoxical that, although both topics were recorded in his unpublished notes (...) of 1837–1838, the second was not explicitly and fully discussed until the fourth edition of the Origin (1866). While no wholly satisfactory explanation of this paradox suggests itself, it seems probable that Falconer's work on the persistence of fossil species of elephant helped Darwin to see the wider significance of the tempo of evolution for his general theory. (shrink)

Functional analysis is the major theoretical perspective of contemporary sociology. Although many fruitful studies of social structure have resulted from the application of this perspective, it has been notably sterile in coping with questions of social change. Two major shortcomings of the functionalist view of change are here examined. The first type of shortcoming might be called 'evolutionary hangovers'. Under this heading we may include 'functional ahistoricism' and a 'commitment to progress'. The second major shortcoming refers (...) to weaknesses of functional theory per se — namely, a confusion of causal analysis with functional analysis, a lack of a theory of deviance, and an over-emphasis on stable equilibrium models. (shrink)

This paper examines the most influential naturalist theory of health, Christopher Boorse’s ‘biostatistical theory’ . I argue that the BST is an unsuitable candidate for the rôle that Boorse has cast it to play, namely, to underpin medicine with a theoretical, value-free science of health and disease. Following the literature, I distinguish between “real” changes and “mere Cambridge changes” in terms of the difference between an individual’s intrinsic and relational properties and argue that the framework of the BST (...) essentially implies a Cambridge-change criterion. The examination reveals that this implicit criterion commits the BST to the troubling view that an individual could go from being diseased to healthy, or vice versa, without any physiological change in that individual. Two problems follow: the current framework of the BST is ill-equipped to formally embrace Cambridge changes and it is theoretically dubious. The arguments advanced here are not limited to the BST; I suggest they extend to any naturalist claim to underpin medical practice with a value-free theory of health and disease defined in terms of an evolutionary view of biological fitness. (shrink)

Evolutionary game theory has recently furnished some exciting theoretical and experimental insights regarding the birth of social power and discrimination. But can this type of theory illuminate the history and nature of capitalism? The answer turns out to be negative: evolutionary models are bound to remain either insufficiently evolutionary or hopelessly indeterminate. However, social theorists have much to gain from understanding what would breathe social life into evolutionary game theory's models: a proper historical (...) account of the sources of behavioral variety, and an adaptive mechanism that leaves room for the cunning of human reason. (shrink)

The traditional view of evolutionary theory asserts that we can usefully understand natural selection, drift, mutation, migration, and the system of mating as forces that cause evolutionary change. Recently, Denis Walsh and Robert Brandon have objected to this view. Walsh argues that the traditional view faces a fatal dilemma and that the force analogy must be rejected altogether. Brandon accepts the force analogy but argues that drift, rather than the Hardy-Weinberg law, is the (...) best candidate for a zero-force law. Here I defend the traditional view against these objections. (shrink)

An insider's provocative account of one of the most contentious debates in science today When Niles Eldredge and Stephen Jay Gould, two of the world's leading evolutionary theorists, proposed a bold new theory of evolution—the theory of "punctuated equilibria"—they stood the standard interpretation of Darwin on its head. They also ignited a furious debate about the true nature of evolution. On the one side are the geneticists. They contend that evolution proceeds slowly but surely, driven by competition (...) among organisms to transmit their genes from generation to generation. On the other are the paleontologists, like Eldredge and Gould, who show in the fossil record that in fact evolution proceeds only sporadically. Long periods of no change—equilibria—are "punctuated" by episodes of rapid evolutionary activity. According to the paleontologists, this pattern shows that evolution is driven far more by environmental forces than by genetic competition. How can the prevailing views on evolution be so different? In Reinventing Darwin, Niles Eldredge offers a spirited account of the dispute and an impressive case for the paleontologists' side of the story. With the mastery that only a leading contributor to the debate can provide, he charts the course of theory from Darwin's day to the present and explores the fundamental mysteries and crucial questions that underlie the current quarrels. Is evolution fired by a gentle and persistent motor and fueled by the survival instincts of "selfish genes"? Or does it proceed in fits and starts, as the fossil record seems to show? What is the role of environmental changes such as habitat destruction and of cataclysmic events like meteor impacts? Are most species inherently stable, changing only very little until they succumb to extinction? Or are species highly adaptable, changing all the time? Eldredge sorts through the major findings and interpretations and presents a lively introduction to the leading edge of evolutionary theory today. Reinventing Darwin offers a rare insider's view of the sometimes contentious, but always stimulating work of scientific inquiry. PRAISE FOR NILES ELDREDGE'S PREVIOUS BOOKS The Miner's Canary: Unraveling the Mysteries of Extinction "The Miner's Canary rings with integrity. The author takes care to present opposing views. Some readers, indeed, might view Mr. Eldredge as a little too self-effacing; he is, after all, one of the world's leading experts in his field."—The New York Times Book Review Fossils: The Evolution and Extinction of Species "... an important and informative book. It is also delightfully idiosyncratic. This is no scholarly treatise defending academic argument. It is an essay for everyone interested in the story of earthly life."—The Christian Science Monitor Life Pulse: Episodes from the Story of the Fossil Record "This is Earth history on a grand scale; those who enjoy the works of Stephen Jay Gould will appreciate Life Pulse."—Publishers Weekly. (shrink)

Karl Popper argued in 1974 that evolutionary theory contains no testable laws and is therefore a metaphysical research program. Four years later, he said that he had changed his mind. Here we seek to understand Popper’s initial position and his subsequent retraction. We argue, contrary to Popper’s own assessment, that he did not change his mind at all about the substance of his original claim. We also explore how Popper’s views have ramifications for contemporary discussion of the (...) nature of laws and the structure of evolutionary theory. (shrink)

Our paper aims at bringing to the fore the crucial role that habits play in Charles Darwin’s theory of evolution by means of natural selection. We have organized the paper in two steps: first, we analyse value and functions of the concept of habit in Darwin's early works, notably in his Notebooks, and compare these views to his mature understanding of the concept in the Origin of Species and later works; second, we discuss Darwin’s ideas on habits in the (...) light of today’s theories of epigenetic inheritance, which describe the way in which the functioning and expression of genes is modified by the environment, and how these modifications are transmitted over generations. We argue that Darwin’s lasting and multifaceted interest in the notion of habit, throughout his intellectual life, is both conceptually and methodologically relevant. From a conceptual point of view, intriguing similarities can be found between Darwin’s (early) conception of habit and contemporary views on epigenetic inheritance. From a methodological point of view, we suggest that Darwin’s plastic approach to habits, from his early writings up to the mature works, can provide today’s evolutionary scientists with a viable methodological model to address the challenging task of extending and expanding evolutionary theory, with particular reference to the integration of epigenetic mechanisms into existing models of evolutionary change. Over his entire life Darwin has modified and reassessed his views on habits as many times as required by evidence: his work on this notion may represent the paradigm of a habit of good scientific research methodology. (shrink)

Through the lens of the Health Belief Model and Protection Motivation Theory, we analyzed interviews of 36 agricultural advisors in Indiana and Nebraska to understand their appraisals of climate change risk, related decision making processes and subsequent risk management advice to producers. Most advisors interviewed accept that weather events are a risk for US Midwestern agriculture; however, they are more concerned about tangible threats such as crop prices. There is not much concern about climate change among agricultural (...) advisors. Management practices that could help producers adapt to climate change were more likely to be recommended by conservation and Extension advisors, while financial and crop advisors focused more upon season-to-season decision making. We contend that the agricultural community should integrate long-term thinking as part of farm decision making processes and that agricultural advisors are in a prime position to influence producers. In the face of increasing extreme weather events, climatologists and advisors should work more closely to reach a shared understanding of the risks posed to agriculture by climate change. (shrink)

The idea of moral progress played a central role in liberal political thought from the Enlightenment through the nineteenth century but is rarely encountered in moral and political philosophical discourse today. One reason for this is that traditional liberal theorists of moral progress, like their conservative detractors, tended to rely on under-evidenced assumptions about human psychology and society. For the first time, we are developing robust scientific knowledge about human nature, especially through empirical psychological theories of morality and culture that (...) are informed by evolutionary theory. On the surface, evolutionary accounts of morality paint a rather pessimistic picture of human moral nature, suggesting that certain types of moral progress are unrealistic or inappropriate for beings like us. Humans are said to be ‘hard-wired’ for tribalism. However, such a view overlooks the great plasticity of human morality as evidenced by our history of social and political moral achievements. To account for these changes while giving evolved moral psychology its due, we develop a dynamic, biocultural theory of moral progress that highlights the interaction between adaptive components of moral psychology and the cultural construction of moral norms and beliefs, and we explore how this interaction can advance, impede, and reverse moral progress. (shrink)

The theory of Punctuated Equilibria challenges the neo‐Darwinian tenet that evolution is a uniform process. Recently, an article by Hunt1 has found that directional change during the evolution of a lineage is relatively small (occurring only in 5% of 250 analyzed traits). Of those traits that were shown to follow a trend, size was more likely to show gradual changes, whereas shape changes were more random. Here, we provide a short view of the nature of evolutionary (...) trends, showing that directional change within lineages and among clades provides valuable evolutionary information about the processes involved in their generation. BioEssays 30:521–525, 2008. © 2008 Wiley Periodicals, Inc. (shrink)

Most epistemologists maintain that we are rationally required to believe what our evidence supports. Generally speaking, any factor that makes it more probable that a given state of affairs obtains (or does not obtain) is evidence (for that state of affairs). In line with this view, many metaethicists believe that we are rationally required to believe what’s morally right and wrong based on what our moral evidence (e.g. our moral intuitions, along with descriptive information about the world) supports. However, (...) sometimes we get information about our evidence, such as a theory that explains that all moral intuitions are ultimately caused by evolutionary forces. Such genealogical claims like this take form as a puzzle about how to rationally respond to higher-order evidence in moral epistemology. How should we change our moral views in response to genealogical claims about the evolutionary origin of our moral beliefs or about widespread moral disagreement? This introductory chapter first explains the issue about how to change our moral views based on an easily accessible example. Then it shows how recent debates about the puzzle of higher-order evidence bears on recent debates in moral epistemology, notably the debates about evolutionary debunking arguments in metaethics, the epistemic significance of moral peer disagreement, moral testimony, and collective moral knowledge before it introduces the chapters of this book. (shrink)

Among the different approaches to comparative tax law the one adopted here views comparative taxation as a descriptive tool conducive to tax design, a tax policy approach grounded in an evolutionary concept of tax change. Comparative taxation should be based on the functions of tax rules, with the goal of identifying similarities and differences between domestic tax systems, and should indicate potential alternative solutions to common policy issues by looking at how the basic elements of tax law-in-action interact. (...) The Article develops a theoretical framework for comparative tax research and uses examples drawn from a comparative study on the General Anti-Avoidance Rule in Canada and China, thus endeavouring to provide a crosscultural inquiry into tax transplants across the divide of Western and non-Western legal traditions. It is claimed here that a common model of tax systems should be adopted for the purpose of comparing them, and that legal theory is needed to pursue this task. The use of legal theory as a critique of municipal tax ideas is discussed in Part I, while Parts II and III deal with how legal theory can be used to describe the structure and evolution of tax systems by relying on concepts of legal hierarchies and chains of productions of tax rules. Part IV concludes with practical applications of legal theory in comparative tax research in respect to tax transplants and tax design issues by providing an explanatory framework of General Anti-Avoidance Rules in Canada and China. (shrink)

This review essay reflects on recent discussions in evolutionary biology and philosophy of science on the central causes of evolution and the structure of causal explanations in evolutionary theory. In this debate, it has been argued that our view of evolutionary causation should be rethought by including more seriously developmental causes and causes of the individual acting organism. I use Tobias Uller’s and Kevin Laland’s volume Evolutionary Causation as well as recent reviews of it (...) as a starting point to reflect on the causal role of agency, individuality, and the environment in evolution. In addition, I critically discuss classical philosophical frameworks of theory change used in this debate to understand changing views of evolutionary causation. (shrink)

The article discusses principles that form part of evolutionary systems thinking in social sciences and humanities. It is argued that introducing the concept of self-organization relates agency and structures in a way that makes it possible to take up certain features of Critical Theory by which it can meet the demands for a critical social science. These principles are applied to the question of whether there is convergence or divergence in and by means of the Internet. It will (...) be clarified that the Internet is basically a social system and that it is a subsystem of the larger and overarching system of the whole society. It will be shown how the Internet can be perceived as a possible trigger for societal developments bringing about fundamental change in the nature of society. Thus the article cuts across philosophical, system theoretical, social theoretical, sociology of technology, and information society theory considerations. Key Words: dynamic • "mechanism" • self-organizaton • revolution • evolution • Critical Theory • information society • Internet. (shrink)

This paper proposes a biosemiotic conception of theories, as non-intentional organic theories, which is based on an analysis and comparison of philosopher Norwood Russell Hanson’s account of theories and zoologist Jakob von Uexküll’s theory of organisms. It is argued that Hanson’s proposals about scientific theories and their relation to observation are semiotic in nature and that there exists a correspondence between Hanson’s depiction of the relationship between theories, observation, and reality and von Uexküll’s views on the relationship between organisms (...) and their environments. This correspondence supports an account of theories that depicts them as organic extensions of our perceptual physiology. Among the epistemological consequences of this account are the following: The kind of correspondence that is established through theories between a subject and reality is related rather to a subject’s actions than to a faithful representation of every aspect of the world, it suggests a strong emphasis on the creative aspects of knowledge acquisition, and it urges a reassessment of the evolutionary epistemology of theories. (shrink)

In this book, Koo discusses political change in the view of Confucian thought. This study focuses on the Book of Change, which is one of the nine basic books of Confucius School; it has dominated oriental thought in this field for more than three thousand years. The aim of this study is to analyze and arrange its theory of change, and to apply it to political reality. Therefore, this book analyzes and summarizes the theories of (...) change and applies those theories to political change. From that process, the theories of political changes are developed. Their usefulness is tested in the real world and compared to the existing theories of political change. The result is to develop and present a new theory of political change. (shrink)

The theory of self-organization of complex systems studies laws of sustainable co-evolutionary development of structures having different speeds of development as well as laws of assembling of a complex evolutionary whole from parts when some elements of “memory” must be included. The theory reveals general rules of nonlinear synthesis of complex evolutionary structures. The most important and paradoxical consequences of the holistic view, including an approach to solving the riddle of human personality, are as (...) follows: 1) the explanation why and under what conditions a part can be more complex than a whole ; 2) in order to reconstruct society it is necessary to change an individual but not by cutting off the supposed undesirable past, since a human being as a microcosm is the synthesis of all previous stages of evolution, and as a result of repression of, it would seem, the wild past one can extinguish a “divine spark” in his soul; 3) in the physical sense, singularity denotes a moment of instability, phase transition; one can talk about the human singularity of co-evolutionary processes, since in such a moment of instability individual actions of a human can play a key role in determining a channel of further development as well as in appearance of a new pattern of collective behavior in society; 4) as the models of nonlinear dynamics, elaborated at the Keldysh Institute of Applied Mathematics of the Russian Academy of Sciences in Moscow, show, there is a possibility of a direct influence of the future and even a touch of an infinitely remote future in certain evolutionary regimes and under rigorously definite conditions, more over, it turns out that such a possibility exists only for a human but not for the human society. (shrink)

As an outcome of scientific thinking, evolutionary theories change in accordance with progress made. Here, we trace the evolution of evolutionary thought through seven different research schools that have arisen since the introduction of Darwin’s Origin of Species. These schools include Darwinism, the Modern Synthesis, Micro-, Meso-, and Macroevolution, Ecology, and Reticulate Evolution. The schools of Darwinism and the Modern Synthesis together lie at the foundation of the Neo-Darwinian paradigm. This paradigm has now expanded into the schools (...) of Microevolution, Mesoevolution, and Macroevolution that respectively study how genes, organisms, and species evolve over time. The school of Ecology instead investigates how genes, organisms, and species interact with one another and with the physical environment in space. The Eco-Evo-Devo paradigm attempts to integrate the tenets of Ecology with those of Micro-, Meso-, and Macroevolutionary research. The Reticulate Evolution school studies non-selectionist mechanisms such as symbiosis, symbiogenesis, lateral gene transfer, infective heredity, and hybridization. This paper outlines the major research directions and points of controversies that arise between these distinct schools. It furthermore situates the Extended Evolutionary Synthesis and Third Way of Evolution along these schools. The call for an Extended Evolutionary Synthesis originated in the Mesoevolution school, while scholars active in the Third Way of Evolution movement are developing ways to recognize the important contributions made by all evolution schools. (shrink)

The philosophical or metaphysical architecture of Darwin's theory of evolution by natural selection is analyzed and diflussed. It is argued that natural selection was for Darwin a paradigmatic case of a natural law of change — an exemplar of what Ghiselin (1969) has called selective retention laws. These selective retention laws lie at the basis of Darwin's revolutionary world view. In this essay special attention is paid to the consequences for Darwin's concept of species of his selective (...) retention laws. Although Darwin himself explicity supported a variety of nominalism, implicit in the theory of natural selection is a solution to the dispute between nominalism and realism. It is argued that, although implicit, this view plays a very important role in Darwin's theory of natural selection as the means for the origin of species. It is in the context of these selective retention laws and their philosophical implications that Darwin's method is appraised in the light of recent criticisms, and the conclusion drawn that he successfully treated some philosophical problems by approaching them through natural history. Following this an outline of natural selection theory is presented in which all these philosophical issues are highlighted. (shrink)

Species are thought by many to be important units of evolution. In this paper, I argue against that view. My argument is based on an examination of the role of species in the synthetic theory of evolution. I argue that if one adopts a gradualist view of evolution, one cannot make sense of the claim that species are units in the minimal sense needed to claim that they are units of evolution, namely, that they exist as discrete (...) entities over time. My second argument is directed against an appeal to Eldredge and Gould's theory of punctuated equilibria to support the claim that species are units of evolution. If one adopts their view, it may be possible to identify discrete temporal entities that can plausibly be termed species, but there is no reason to claim that those entities are units of evolution. Thus, on two plausible interpretations of the role of natural selection in the process of evolution, species are of no special importance. I then consider some of the reasons why species have been thought to be important evolutionary units by many contemporary evolutionary biologists. Finally, I discuss briefly the implications of this conclusion for evolutionary biology. (shrink)

In responding to three reviews of Evolution in Four Dimensions (Jablonka and Lamb, 2005, MIT Press), we briefly consider the historical background to the present genecentred view of evolution, especially the way in which Weismann’s theories have influenced it, and discuss the origins of the notion of epigenetic inheritance. We reaffirm our belief that all types of hereditary information—genetic, epigenetic, behavioural and cultural—have contributed to evolutionary change, and outline recent evidence, mainly from epigenetic studies, that suggests that (...) non-DNA heritable variations are not rare and can be quite stable. We describe ways in which such variations may have influenced evolution. The approach we take leads to broader definitions of terms such as ‘units of heredity’, ‘units of evolution’, and ‘units of selection’, and we maintain that ‘information’ can be a useful concept if it is defined in terms of its effects on the receiver. Although we agree that evolutionary theory is not undergoing a Kuhnian revolution, the incorporation of new data and ideas about hereditary variation, and about the role of development in generating it, is leading to a version of Darwinism that is very different from the gene-centred one that dominated evolutionary thinking in the second half of the twentieth century. (shrink)

One contentious debate in the philosophy of biology is that between the statisticalists and causalists. The former understand core evolutionary concepts like fitness and selection to be mere statistical summaries of underlying causal processes. In this view, evolutionary changes cannot be causally explained by selection or fitness. The causalist side, on the other hand, holds that populations can change in response to selection—one can cite fitness differences or driftability in causal explanations of evolutionary change. (...) But, on the causalist side, it is often not clear how, precisely, one should understand these causes. Thus, much more could be said about what sort of causes fitness and driftability are. In this paper, I borrow Dretske's distinction between structuring and triggering causes and I suggest that fitness and driftability are structuring causes of evolution. (shrink)

With historical hindsight, it can be little questioned that the view of protozoa as unicellular organisms was important for the development of the discipline of protozoology. In the early years of this century, the assumption of unicellularity provided a sound justification for the study of protists: it linked them to the metazoa and supported the claim that the study of these “simple” unicellular organisms could shed light on the organization of the metazoan cell. This prospect was significant, given the (...) state of cytology circa 1910. In the wake of the major gains made in understanding nuclear division in the last two decades of the nineteenth century, cytology was suddenly confronted with many, seemingly less penetrable, problems. Several aspects of nuclear organization still remained unexplained, and recent research had revealed the presence in the cytoplasm of structures whose functions in cell life were unknown. Classical methods of cytology, relying on descriptive, morphological analysis, seemed ill equipped to resolve these questions.Hertwig's program for protozoology, grounded in the assumption of the fundamental unity of organization in protozoa and metazoa, offered a potential means for investigating these and other problems of cell theory. Linked to mainstream cytology, protozoology was advocated as a means of experimentally investigating key biolobical processes — reproduction, metabolism, and organelle morphology and physiology — less accessible in higher organisms. Protozoa were hailed as prime experimental organisms, in which cell structure and function could be more easily studied. Unlike the metazoan cell, they could be subjected to controlled experiments in which the external environment was modified and the effects monitored. Protozoa offered, in other words, a promising experimental means by which to investigate the cell — its structures and its processes.The success of this program within Germany was soon apparent. In contrast to the rather neglected state of the discipline in 1900, protozoology began to be recognized as more than a somewhat obscure area of study for specialists. In practical terms, this translated into greater numbers of students attracted to the field, increased institutional support for the discipline, and its elevation in status within the biological sciences as new developments, particularly in connection with medical applications, began to draw attention to the field.64The unicellular hypothesis also promoted the internal development of the science. It provided a rationale for introducing the various techniques used in cytology, embryology, physiology, and the new field of biochemistry as suitable research tools for protozoology as well. This vastly extended the research possibilities and facilitated the understanding of, among other things, protozoan organization, modes of reproduction, and evolutionary relationships. The new experimental grounding of the discipline in turn fitted in well with developments in biology at large: in contrast to the descriptive methodology that had predominated in the nineteenth century, this new experimental program placed protozoology at the forefront of the early twentieth-century movement to make biology an experimental science comparable to physics and chemistry.Yet the criticism of the unicellular hypothesis can also be seen as having served a valuable function within the development of the discipline. It focused attention on the study of protists as organisms in their own right, not simply as models for metazoan cells. More generally, it helped to remind biologists of the particular evolutionary assumptions that supported this conception. Dobell and other British critics pointed out, among other things, the association between the theory of recapitulation and the interpretation of protozoa as unicellular organisms. At the time when the recapitulation theory and the germ-layer doctrine were in decline, it was important to stress how these evolutionary ideas also entered into the contemporary concepts of subsidiary specialties. This was as true for protozoology as it was for cell theory itself. The chromidial theory, in its various guises, and the binuclearity hypothesis did in fact contain elements of recapitulationist reasoning, and they were open to criticism for the same kind of overly speculative theorizing that characterized this evolution theory. Dobell's critique forced protozoologists and cell theorists alike to review the theoretical postulates guiding their investigations.In the absence of further historical studies, it is hard to evaluate the consequences of this debate in later years. The issue was not whether protozoa were the precursors of metazoa — both sides accepted this. They disagreed over which particular protozoon had served as the ancestral form, and this, in turn, influenced their stance on the question of unicellularity. The situation is little changed today. Because the former question is still an open one, the latter remains so too. Both of the models for the origin of multicellular organisms — colonies of ciliates versus multinucleate protists — are still presented as possible mechanisms in modern textbooks of evolution. Unable to judge the dispute in terms of the ultimate validity of the competing conceptions, the historian requires other criteria. It perhaps becomes more important to evaluate the issues in the context of the internal and external stimulus they provided the discipline.65 In these terms, and from the present historical vantage point, Hertwig's research program for protozoology, based upon the unicellular hypothesis, appears to have been a successful one. (shrink)

This paper discusses how Mark Blaug reversed his thinking about the historiography of economics, abandoning 'rational' for 'historical' reconstruction, and using an economics of scientific knowledge argument against Paul Samuelson and others that rational reconstructions of past ideas and theories in the "marketplace of ideas" were Pareto inefficient. Blaug's positive argument for historical reconstruction was built on the concept of "lost content" and his rejection of the end-state view of competition in favor of a process view. He used (...) these ideas to emphasize path dependency in the development of economic thinking, thereby advancing an evolutionary view of economics that has connections to a Lakatosian understanding of economic methodology. The paper argues that Blaug was essentially successful in criticizing the standard rational reconstructionist view of the history of economic thought in economics, and that this is borne out by the nature of the change in recent economics. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Kiyozawa Manshi’s Two Theories of Evolution and Their Western InspirationDennis PROOIIntroductionIf one solely were to confine the scope of one’s inquiry into the defining trait of a “Tokyo School of Philosophy” to the years immediately following the founding of Tokyo University in 1877, it would be hard to escape the conclusion that philosophy there at the time was determined almost entirely by the dominant intellectual wind blowing through its (...) lecture halls, namely that of evolutionary theory. Katō Hiroyuki (1836–1916), president of the university from 1890 to 1893, was one of its staunchest advocates, doing much to foster the spread of ideas that would today be typified as “Social-Darwinian.”1 Inoue Enryō (1858–1919), undoubtedly the Meiji period’s most successful public philosopher, came to embrace many Spencerian ideas on evolution under the influence of Toyama Masakazu (1848–1900), a devout Spencerian, during his time as a student there (from 1881 to 1885).2 Ernest F. Fenollosa (1853–1908), an American philosopher who exerted great influence over the university’s young philosophical minds, was working on a synthesis of the Spencerian and Hegelian philosophical systems.3 He had been brought to Tokyo University by the Darwinian zoologist Edward S. Morse (1838–1925), who was himself instrumental in the spread of evolutionary ideas. This quick survey of Tokyo notables serves not only to establish the dominance of evolutionary theory, but also to show how in the context of late nineteenth-century Japan, “evolutionary theory” (shinkaron 進化論) is best understood as an umbrella term that could refer to a wide array of ideas—including, but certainly not limited to, Darwinian, Social-Darwinian, Spencerian, and Hegelian ones, or a mix of these—on the nature of (individual and social) change, development, and progress.Although the impact of 1859’s The Origin of Species made Darwin a figure impossible to ignore, by no means was evolutionary theory [End Page 77] equated with his theory of natural selection. For their ideas of evolution, many looked to Herbert Spencer (1820–1903), regarded by the Victorian English as the philosopher of evolution and whose system of synthetic philosophy presented positivist-leaning Meiji-era Japanese intellectuals with a definitive model of philosophical achievement. Spencer prided himself in having been the first to formulate the principle of evolution, remarking in the revised version of Social Statics (1892) that he had arrived at the general idea as early as 1850, many years before The Origin of Species had appeared in print.4 From Spencer’s point of view, Darwin had done no more than confirm a posteriori for biological organisms what was in fact an a priori law of evolution, established by Spencer in First Principles (1867) both inductively and deductively as the universal tendency of phenomena to pass from “an indefinite, incoherent homogeneity to a definite, coherent heterogeneity,” a process accompanied by “an integration of matter and concomitant dissipation of motion.”5 Spencer’s nod to the materialist tradition by formulating his conception of evolution in terms of matter in motion in his own self-understanding placed him in the camp of English philosophy, which did not let itself be deluded by the wrong use of language and spurned the invocation of what from its perspective was superfluous metaphysics. The opposing camp of German philosophy—following William Hamilton (1788–1856), derided by Spencer as “absolute theorisers”—made abundant use of such metaphysics to defend a teleological understanding of evolution—the kind of understanding Darwin (with his emphasis on the non-teleological character of natural selection) and Spencer (with his focus on matter in motion) attempted to render obsolete.6Under the influence of Fenollosa, many students of philosophy at Tokyo University became attracted to the alternative German teleological model of evolution, the history of which via the German Romantics goes back to Leibniz’s attempt to reintroduce into physics the idea of final causes after these in that domain had been eliminated by Descartes.7 Descartes, to begin with, was the one to revolutionize natural philosophy by reducing the physical world to one of matter in motion ruled by efficient causation, imagining, much like Spencer two centuries later, that such a minimalist view of... (shrink)

According to a classical narrative, early geneticists, failing to see how Mendelism provides the missing pieces of Darwin’s theory, rejected gradual changes and advocated an implausible yet briefly popular view of evolution-by-mutation; after decades of delay (in which synthesis was prevented by personal conflicts, disciplinary rivalries, and anti-Darwinian animus), Darwinism emerged on a new Mendelian basis. Based on the works of four influential early geneticists – Bateson, de Vries, Morgan and Punnett –, and drawing on recent scholarship, we (...) offer an alternative that turns the classical view on its head. For early geneticists, embracing discrete inheritance and the mutation theory (for the origin of hereditary variation) did not entail rejection of selection, but rejection of Darwin’s non-Mendelian views of heredity and variation, his doctrine of natura non facit saltum, and his conception of “natural selection” as a creative force that shapes features out of masses of infinitesimal differences. We find no evidence of a delay in synthesizing mutation, rules of discrete inheritance, and selection in a Mendelian-Mutationist Synthesis. Instead, before 1918, early geneticists had conceptualized allelic selection, the Hardy–Weinberg equilibrium, the evolution of a quantitative trait under selection, the probability of fixation of a new mutation, and other key innovations. Contemporary evolutionary thinking seems closer to their more ecumenical view than to the restrictive mid-twentieth-century consensus known as the Modern Synthesis. (shrink)

_One of the enduring queries in the development of human intellectual thought is, "What is human nature?" What does it mean to be a human tends to be defined by all disciplines, including religion? We all need theories about what makes people tick in order to predict how they will respond to their environment in various situations. Indeed, how we view human nature affects a number of things. People utilize it in their private lives to govern their daily routines, (...) manage their relationships, raise their children, and influence others. Additionally, our policies in areas of collective social life like politics, law, and education are influenced by how we view human nature. Steven Pinker critically explains the modern view of human nature and its theoretical presuppositions in his widely read book The Blank Slate: The Modern Denial of Human Nature. Pinker contends that this contemporary account of human nature faces significant challenges in light of recent developments in the fields of biology, genetics, evolution, and the brain sciences. Because it is built on axioms that we cannot accept in light of the advancements in science over the past few decades, the current theory of human nature is conceptually unsound. This research performs a comparative analysis between Pinker’s View of Human Nature and Dupré’s Critique of Evolutionary Psychology on the principles which serve as the foundation for the influential idea of human nature, and contributes significantly in our contemporary intellectual life._. (shrink)

Horizontal gene transfer in the form of long DNA fragments has changed our view of bacterial evolution. Recently, we discovered that such processes may also occur with the massive amounts of short and damaged DNA in the environment, and even with truly ancient DNA. Although it presently remains unclear how often it takes place in nature, horizontal gene transfer of short and damaged DNA opens up the possibility for genetic exchange across distinct species in both time and space. In (...) this essay, we speculate on the potential evolutionary consequences of this phenomenon. We argue that it may challenge basic assumptions in evolutionary theory; that it may have distant origins in life's history; and that horizontal gene transfer should be viewed as an evolutionary strategy not only preceding but causally underpinning the evolution of sexual reproduction. (shrink)

De Vries' mutation theory has not stood the test of time. The supposed mutations of Oenothera were in reality complex recombination phenomena, ultimately explicable in Mendelian terms, while instances of large-scale mutations were found wanting in other species. By 1915 the mutation theory had begun to lose its grip on the biological community; by de Vries' death in 1935 it was almost completely abandoned. Yet, as we have seen, during the first decade of the present century it achieved (...) an enormous popularity. As this paper has tried to suggest, one of the principal reasons for this was that de Vries' theory served as a banner around which a whole crowd of disaffected Darwinians or anti-Darwinians could rally. However, not all of those who favored de Vries did so for quite the same reasons. Underlying the multitude of views ran several common threads: a dissatisfaction with current Darwinian theory born out of misunderstanding natural selection, a general misunderstanding of the nature of species, and a prejudice against speculative, nontestable theories in biology.Supporters of de Vries were not the only opponents of Darwinism, nor was the mutation theory the only alternative to natural selection. In the early twentieth century a number of theories had been proposed to explain away the problems which Darwin had left unsolved. There was the idea of orthogenesis, championed by the American paleontologists Cope, Osborn and others; organic selection (or orthoplasy) was championed by M. M. Baldwin and C. Lloyd Morgan; there were the concepts of convergent evolution proposed by Hermann Friedmann, the theory of physiological selection by John George Romanes, and the concepts of reproductive divergence by H. M. Vernon. Virtually none of these men either accepted or were strong supporters of the de Vriesian theory, for each had his own particular ‘ism” to advocate as the major factor in evolution. The existence of a large number of such theories, each purporting to be the explanation, was characteristic of evolutionary theory at the turn of the century. It is to a large extent the emphasis on such fragmentary concepts that retarded development of the comprehensive theory of evolution which emerged in the 1920's and 1930's. For the historian, however, a study of these alternative theories is instructive in trying to understand the inherent difficulties which Dawwinian theory posed to biologists at the time. De Vries' mutation theory serves historically as a mirror to reflect the critical mood of a generation hostile to the theory of natural selection.It has often been claimed that it was impossible to understand the mechanism of natural selection until it could be placed in genetic and mathematical terms. It is certainly true that great strides have been made in population genetics and the treatment of evolutionary concepts with mathematical tools in the last forty years. But the very people who developed the genetical and mathematical approach to evolution were already convinced of the essential correctness of Darwinian theory before they started. Advances in an understanding of Mendelian heredity aided greatly in solving one important issue for evolutionists: the origin of variations. And the rigor with which selection acted could best be studied by observing changes in gene frequencies (calculated mathematically) over a number of generations. But as this paper has shown, two of the basic problems which biologists faced in evaluating Darwinian theory at the turn of the century-the nature of species, and the criteria of what constituted an acceptable explanation in biological science-could not be answered directly by mathematics. What mathematical and genetical theory did do was to help convince the skeptics of the validity of the Darwinian proposition.The change in explanatory criteria which many hailed as de Vries' most important contribution to evolutionary theory seems to have been part of a general emergence of twentieth-century biology from the domination of theorizers in the nineteenth. It also marked the emergence of America from the domination of biological, and particularly evolutionary, influence of Europeans. The change occurred in three areas: in the kinds of questions asked: testable versus non-testable; in the kind of data sought: quantitative versus qualitative; and in the kinds of theories proposed: analytical and reductive—the attempt to see complex processes in terms of simpler components-as opposed to synthetic and speculative. Although ultimately wrong in his idea, de Vries and his theories rode high on the wave of “experimentalism” which was the harbinger of a new era in evolutionary theory. (shrink)

Darwin's theory of evolution brought to an end the static view of nature. It was no longer possible to think of species as immortal, with secure places in nature. Fluctuation of population could no longer be thought of as occurring within definite limits which had been set at the time of creation. Nor was it any longer possible to generalize from the differential reproductive potentials, or from a few cases of mutualism between species, that everything in nature was (...) “fitted to produce general ends, and reciprocal uses.” 134 The appeal to “design” could no longer be substituted for answers to questions concerning animal demography. Instead, the dynamics of a population had to be viewed as the outcome of species' struggle against animate and inanimate factors in the environment. Both the members of a species and the environmental factors tend to vary randomly, and therefore neither evolution nor population dynamics could be fully understood alone. For this reason Darwin's linking of the two subjects was inevitable and not merely an historical accident. Since Darwin had shown that no automatic equilibrium existed, he demonstrated the importance of closer study of the causes of population dynamics and extinction. He also indicated that an understanding of population depends upon the development of a broad knowledge in ecology.Viewed from another direction, Darwin's work ended the early modern era of population studies by clarifying three interrelated problems which were important for understanding population: extinction, distribution, and the nature of species. The components of his answer had been discussed in the eighteenth century, but there had not existed enough evidence for the completion of the revolution in thought which had then begun. At the beginning of the nineteenth century, Playfair found the evidence for extinction conclusive, and, in spite of Lamarck, Curvier convinced the scientific world that there could no longer be any doubt about it. This was a step the importance of which, with his limited knowledge of biogeography and population, Cuvier could not have fully realized. Lamarck attempted, with his evolutionary theory, to circumvent the necessity for admitting extinction, but he overestimated the adaptability of organisms and in doing so he underestimated the importance of competition and the whole field of ecology. On the other hand, he was not willing to let questions such as the origin of species remain taboo to science. The origin of species was a biogeographical as well as a paleontological question. Humboldt correlated environment with the distribution of species and conveyed the impression that plant communities are subject to change. De Candolle, following the lead of Linnaeus and Humboldt, emphasized the ecological aspects of biogeography, not only the importance of habitat and range, clearly showing the ecological effects of competition. The entomologists Kirby and Spence took a faltering step toward understanding the relationship between population and ecological role, but they fell short of any significant new conclusions. Neither they nor Swainson could fully comprehend the new perspective of De Candolle.Lyell was able to bring together the evidence from these three lines of investigation and weave them into an important synthesis that almost accomplished that Darwin later did. Although opposing Lamarck's theory of evolution, Lyell had a dynamic view of ecology. He realized that population dynamics offered an important key to the understanding of biogeography. Since he knew that species become extinct, he investigated closely the factors which could either preserve or extinguish species. While explaining these factors, he described the interrelationships of species in greater detail than had ever been done before. Forbes continued to develop Lyell's ecological concepts, and his first-hand field experience enabled him to describe biotic communities more concretely than Lyell had.Having the advantages of Lyell's understanding and his own experience from a global voyage, Darwin could take the final step from the static to the dynamic concept of life. He had seen populations fluctuating and also fossil species in South America, and on the Galapagos Islands he had encountered a biogeographical problem that could not be credibly solved without the idea of evolution. However, the bare idea of evolution did not fully answer his questions. He sought physiological causes of extinction before he read Malthus and realized that De Candolle and Lyell had correctly emphasized the importance of competition. Darwin found that, in order to understand evolution, he needed to improve his understanding of ecology. He wanted to know when populations were most easily decimated, how extensive were competition and cooperation, what effects parasites have upon populations, and what changes occur in biotic communities when a species is either added or subtracted. He contributed to some extent to answering these questions. Though there remained much for others to do, there was now a new and more secure theoretical framework within which later studies could be interpreted. As Ernst Mayr has observed, Darwin's “consistent thinking in terms of population has had an impact on biological theory and practice which is second only to his sponsorship of natural selection as the mechanism of evolution.” 135. (shrink)