parte prima, Dalla Modernità al compimento dell'Idealismo : il forse minore e il forse maggiore: Il forse minore radicale : René Descartes -- Il forse maggiore della scommessa : Blaise Pascal -- Il forse maggiore teoretico e pratico : Immanuel Kant -- Davanti al forse il "salto mortale" : F.H. Jacobi -- L'altro forse della "filosofia positiva" : F.W.J. Schelling -- Soglia : L'emergenza della libertà -- Parte seconda, Dopo Heidegger : declinazioni di un forse rivelativo : L'indecidibile forse : (...) Jacques Derrida -- Il forse rivelativo : Luigi Pareyson -- Il debolismo rivelativo debole : Umberto Eco -- Il debolismo rivelativo forte : Gianni Vattimo -- Il forse tensivo : Ugo Perone -- Il forse paradossale : Claudio Ciancio -- La radicalizzazione speculativa del forse : Massimo Cacciari -- Invece di una conclusione : "Forse che si, forse che no" -- Postilla non scientifica. (shrink)

Betrachtet man das breite Spektrum an produktiven Wechselwirkungen zwischen den beiden Kulturnationen Italien und Deutschland, so ist es verwunderlich, dass die italienische Philosophie in Deutschland immer noch als „terra incognita“ (Ugo Perone) gelten darf. Darum bringt dieser Band das ‚transalpine‘ Wechselspiel von Rezeption und Transformation im deutsch-italienischen Denken exemplarisch zur Sprache. Im Zentrum stehen die Bereiche der Aufklärung (Vico, Herder), der klassischen deutschen Philosophie (Kant, Fichte, Schelling, Hegel), der Philosophie des Risorgimento (Rosmini, Gioberti) und der Philosophie der Gegenwart (Luigi (...) Pareyson und die Turiner Schule). (shrink)

Chapter 1 First Person Access to Mental States. Mind Science and Subjective Qualities -/- Abstract. The philosophy of mind as we know it today starts with Ryle. What defines and at the same time differentiates it from the previous tradition of study on mind is the persuasion that any rigorous approach to mental phenomena must conform to the criteria of scientificity applied by the natural sciences, i.e. its investigations and results must be intersubjectively and publicly controllable. In Ryle’s view, philosophy (...) of mind needs to adopt an antimentalist stance to achieve this aim. Antimentalism not only definitively rejects the idea that mind is a substance separated from the body, it also denies that mental phenomena radically differ from physical phenomena by virtue of several unique features. Most problematically, mental phenomena have a conscious character (mental states are related to specific qualitative feelings) and are accessible only to the first-person (only the subject knows directly what s/he is experiencing inside his/her mind). Ryle takes a strong stance on antimentalism going so far as to maintain that an approach to mind which aims to meet the criteria of scientificity set by the natural sciences must avoid any reference to internal, unobservable mental states. In his view (which is considered a specifically philosophical version of psychological behaviorism and also addresses questions put forward in psychological research), mental states can be redescribed in terms of behavioral dispositions. In this chapter, we address the historical roots of the antimentalist view and analyze its relation to the later tradition of research on mind. We show that, compared to the antimentalist stance, functionalism and cognitivism take a step back when they maintain that direct reference to mental states is necessary since mental states cause and therefore explain human behavior. This step backwards is often interpreted as a return to mentalism. However, this is only partially true. Indeed, we suggest that these later traditions retain one important element of Ryle’s antimentalism, i.e. the idea that mental states must be uniquely identified using external and publicly observable criteria, while excluding any reference to introspection and those qualitative dimensions of a mental state, which are accessible only to the first-person. According to the perspective we put forward, this epistemological stance has continued to influence contemporary research on mind and current philosophical and psychological theories which both tend to exclude the subjective qualities of human experience from their accounts of how the mind works. The issue we raise here is whether this is legitimate or whether subjective qualities do play a role with respect to the way our mind works. The conclusion of this chapter anticipates the argument the book makes in in favor of this latter position, starting from a particular angle, i.e. the problem of how we categorize concepts related to our internal states. -/- Chapter 2 The Misleading Aspects of the Mind/Computer Analogy. The Grounding Problem and the Thorny Issue of Propriosensitive Information -/- Abstract. After the crisis of behaviorism, cognitivism and functionalism became the predominant models in the field of psychology and of philosophy, respectively. Their success is mainly due to the new key they use for interpreting mental processes: the mind/computer analogy. On the basis of this analogy, mental operations are seen as cognitive processes based on computations, i.e. on manipulations of abstract symbols which are in turn understood as informational unities (representations). This chapter identifies two main problems with this model. The first is how these symbols can relate to and communicate with perception and thus allow us to identify and classify what we perceive through the senses. Here we limit ourselves to presenting this issue in relation to the classical symbol grounding problem originally put forward by Harnad on the basis of Searle’s Chinese room argument. An attempt to address the problem raised here will be made in chap. 3. The second point we discuss in relation to the mind/computer analogy concerns the idea of information it fosters. Indeed, following this analogy, information is something available in the external world which can be captured by the senses and transmitted to the central system without being influenced or modified by the procedures of transmission. This perspective does not take into account that – unlike computers – in living beings information is acquired by means of the body. As Ulric Neisser has already pointed out, the body is itself an informational source that provides us with additional sensory experience that influences (modifies or complements) the information extracted from the external world by the senses. To develop this line of analysis and to determine exactly what information is provided by the body and how this might influence cognition, we examine Sherrington’s and Gibson’s positions. Moving on from their views, we qualify bodily information in terms of ‘proprioception’. We use ‘proprioception’ in a broad sense to describe any kind of experience we have of our internal states (including postural information as well as sensations related to the general state of the body and its parts). Following Damasio’s and Craig’s studies, we further elaborate this position, arguing that living beings are equipped with an internal propriosensitive monitoring system which maps all the changes that constantly occur in our body and that give us perceptual (‘proprioceptive’ or propriosensitive) information about what happens inside us. Moreover, relying on Goldie’s and Ratcliffe’s view, we show that emotional information can also be considered as a form of ‘proprioception’ which contributes to determining everything we perceive. This analysis leads us to the second main thesis of this book: ‘proprioception’ is a form of internal perception and it is an essential component of the sensory information we can access and use for all cognitive purposes. -/- Chapter 3 Semantic Competence from the Inside: Conceptual Architecture and Composition -/- Abstract. Concepts are essential constituents of thought: they are the instruments we use to categorize our experience, i.e. to classify things and group them together in homogeneous sets. Here we define concepts as the internal mental information (representations) that allows us, among other things, to master words in natural language. By analyzing the way in which individuals master word meanings we explore a number of hypotheses regarding the nature of concepts. Following Diego Marconi’s research, we differentiate between two kind of abilities that underpin lexical competence – so-called ‘referential’ and ‘inferential competence’ – and we suggest that, in order to support these abilities, concepts must also include two corresponding kinds of information, i.e. inferential and referential information. We point out that the most widely used and acknowledged theories of concepts do not make this distinction, instead broadly characterizing the information used for categorization in terms of propositionally described feature lists. However, we show that while feature lists can explain inferential competence, they do not account for referential competence. To address the issue of referential competence we examine Ray Jackendoff’s hypothesis that to account for the possibility of linking perceptual and conceptual information we need to assume the existence of a (visual) representation that encodes the geometric and topological properties of objects and bridges the gap between the percept and the concept. Furthermore, we analyze the extension of this work by Jesse Prinz who introduced the notion of a proxytype, a perceptual representation of a class of objects that incorporates structural and parametric information related to their appearance. However, as we point out, proxytypes can only explain the relationship between perception and concepts with respect to instances that can be perceived through the senses and that belong to the same class by virtue of their physical similarity. We suggest that this notion be extended to include larger conceptual classes. To accomplish this, we further develop Mark Johnson, George Lakoff and Jean Mandler’s idea of a schematic image and argue that conceptual representations include a perceptual schema. Perceptual schemata are non-linguistic, structured experiential gestalts (patterns or maps) that make use of information taken from all sensory modalities, including body perception. They accomplish a quasi-conceptual function: they allow us to recognize and to classify different instances. In this work, we hypothesize that perceptual schemata are an essential component of concepts, but not identical to them. Instead, we suggest that concepts include both perceptual and propositional information with perceptual schemata providing the ‘perceptual core concept’ that grounds related propositional information. -/- Chapter 4 In the Beginning There Were Categories. The Bodily Origin of Prelinguistic Categorical Organization: The Example of Folkbiological Taxonomies -/- Abstract. Studies of categorization in psychology and the cognitive sciences have made use of the notions of ‘category’ and ‘concept’ without precisely defining what is meant by either; in fact, often these terms have been used as synonyms, making it difficult to address specific issues related to conceptual development. This chapter begins by discussing the definitions of, as well as the distinctions between, ‘categories’ and ‘concepts’ in the classical philosophical tradition (Aristotle, Kant and Husserl). We introduce our view of categories with reference to Husserl. Categorization is defined as the way in which our experience is originally (pre-linguistically) organized in a passive and fully unconscious manner on the basis of universal structuring principles. Conceptualization is explained as a later process in which the earlier categorical macro-classes are further subdivided into more specific and detailed sets; this later process also relies on linguistic learning and exposure to culture. On the basis of Ray Jackendoff, Jean Mandler, George Lakoff and Mark Johnson’s work, we hypothesize that categorization is a two-step process that begins with the formation of homogeneous sets of entities partitioned into regions that describe the ontological boundaries of the objects that humans perceive (categories) and continues at a later stage with the development of more specific classifications (concepts). In this chapter, we mainly address three related issues: Why should we assume that there is categorical organization which precedes the development of a conceptual system? How do categories and concepts relate to each other? Shall we hypothesize that categories are innate or that they are formed before concepts on the basis of information and organizational structure available at a very early developmental stage? We show that categorical partitions are necessary for categorization and, following Mandler, that the general categories we form at an early age do not match our adult superordinate concepts. As for the third issue, we argue that there might be no need to assume that categories are innately present in the human mind, since their formation can be explained – at least in certain cases – by basic mechanisms that work on body (propriosensitive) information. This hypothesis will not be discussed in general, but in relation to a particularly relevant example of categorical partition, i.e. the folk-biological dichotomy between ANIMATE/INANIMATE. This is compared with other dichotomies that derive from it, but are not directly categorical such as LIVING/NON-LIVING and BIOLOGICAL/NON-BIOLOGICAL. -/- Chapter 5 Internal States: From Headache to Anger. Conceptualization and Semantic Mastery -/- Abstract. Here we ask if we can also apply the distinction between referential and inferential competence we introduced in Chapter 3 to words that do not refer to things that are perceived using the external senses, especially to words/concepts that denote bodily experiences (such as pain, thirst, hunger, etc.) or emotions. We introduce and discuss the hypothesis that – even though such words/concepts do not refer to intersubjectively identifiable entities in the external world – they do have a kind of referent that can be accessed via direct perception, more specifically ‘proprioception’, as we have defined it in terms of all propriosensitive information we can consciously access. In the first part of the chapter, we specifically consider terms denoting bodily experiences such as ‘pain’ or ‘hunger’ and argue that their referents are identified and classified from a first-personal point of view on the basis of four main characteristics: their specific intensity, their localization in the body, their co-occurrence with other signals and above all their specific qualitative sensations. Emotions are addressed in the second part of the chapter. We suggest that there is a continuity between bodily experiences and emotions. In particular, we argue for a perceptual theory of emotions in line with that proposed by James and Lange at the end of the 19th century and developed more recently by authors such as Damasio (see also chap. 2§5, §6). The hypothesis we put forward is that the referential information that supports the categorization of emotions and therefore also our mastery of terms referring to emotions consists in the perception (i.e. the ‘proprioception’) of those bodily states and changes in bodily states which constitute our emotional experience. In the context of this discussion we examine some objections to this line of reasoning that arise from a cognitivist perspective and following authors such as Oatley, Johnson-Laird and Frijda, we distinguish between basic emotions that can be identified and classified solely on the basis on how they feel and complex emotions whose identification and classification additionally depends on cognitive factors. To describe how emotions are identified and classified on the basis of how they feel, we rely on Marcel and Lambie’s distinction between an ‘emotion state’ and an ‘emotion experience’. Both notions indicate kinds of feelings that we consciously experience. However, they describe first-order and second order emotion awareness respectively. The emotion state is the feeling we have of the bodily states and changes that occur when we are experiencing an emotion, while the emotion experience is the fully developed and integrated emotion we both experience and are, with reflection, aware of experiencing. On the basis of this differentiation, we also show that the same characteristics that aid in the identification and classification of bodily experiences (specific qualitative sensations; somatic localization; specific intensity; presence/absence of specific concomitant sensations) can also be used for the identification and classification of emotions – at least basic emotions. In the last two sections of the chapter we present some clinical evidence on the semantic competence of people who suffer from Alexithymia and Autism Spectrum Disorder which supports the conclusions of our preceding analyses. -/- Chapter 6 The ‘Proprioceptive’ Component of Abstract Concepts -/- Abstract. In this chapter, we address the issue of whether the mastery of abstract words requires only inferential knowledge and thus, if the concepts that support the mastery of abstract words include only linguistic information. We start by differentiating the notions of ‘abstract’ and ‘general’ which are often erroneously confused. We then identify a strict definition of abstract, as contrasted with ‘concrete’, that applies to words or concepts whose referent cannot be experienced by the senses. We argue that abstract words/concepts would be better described as theoretical, because they are usually conceived as structured sets of inferential knowledge expressed linguistically; that is, as small theories. Pointing out parallels with Carnap’s analysis of this issue in philosophy of science, we hypothesize that words/concepts denoting non-observable entities are not all ‘equally theoretical’, because their link to sensory experience can be stronger or weaker. We revive the distinction, inspired by Quine, between theoretical and intertheoretical concepts/words. This distinction relies on the fact that the former – unlike the latter – retains a strong, although indirect, connection with perception. In Quine’s discussion, perception is understood uniquely in terms of observability, i.e. of external sensory experience. Here we argue, however, that bodily, ‘proprioceptive’ (i.e. propriosensitive) experience can also serve to referentially ground theoretical (i.e. abstract) concepts/words. We frame this issue using the example of the theoretical concept ‘freedom’ and Lakoff’s hypothesis that this concept is developed on the basis of bodily information. We contrast this with the example of ‘democracy’ which more closely resembles an intertheoretical concept/word. Furthermore, we show that one of the classical views put forward in psycholinguistic research to explain how abstract concepts are mentally represented – i.e. Paivio’s Dual Coding Theory – points in the same direction as our analysis. The same is true of Barsalou’s work suggesting that we use internal information to understand at least some abstract words. To sustain this position, we put forward two lines of evidence: the first comes from psycholinguistic studies while the second examines deficits of semantic competence exhibited by people with Autism Spectrum Disorder. On the basis of our analysis, we put forward a classification that distinguishes between different kinds of concreteness and different degrees of abstraction: concepts/words referring to body experiences and basic emotions are described as analogous to concrete concepts/words because they are grounded in perceptual (i.e. propriosensitive) experience, while abstract concepts/words are considered more or less abstract depending on whether they are intratheoretical (and rely entirely on inferential information) or theoretical (and are partially grounded in perceptual – or more often in propriosensitive perceptual – information). In the last section of the chapter we consider two scales that have been used in psycholinguistic research to measure the degree of concreteness vs. abstractness of words and we show that – used conjointly – they can provide a measure of the internal vs. external grounding of specific words. (shrink)

In the Critique of Practical Reason, Immanuel Kant provides two different propositions of freedom. According to the first, in the “Analytic of Pure Practical Reason,” freedom establishes the possibility of moral agency—i.e., it is the ratio essendi of the moral law. According to the second, in the “Dialectic of Pure Practical Reason,” freedom is the object of one of the practical postulates (CPrR 246–54; AA 5:132–41). Why should Kant postulate something that has been allegedly established as the ground of moral (...) agency? Does Kant appeal to two different conceptions of freedom? In this paper, I argue that Kant (1) in both cases conceives of freedom as an unconditioned form of causality, and (2) pursues two different aims according to two different but complementary arguments. On the one hand (the practical standpoint), he wants to argue that the causality of freedom is actual, through moral agency, in the domain where the laws of nature also apply. On the other hand (the theoretical standpoint), he is aware that the possibility of achieving the highest good would be compromised if we did not assume, along with the other two postulates, a world in which only the causality of freedom applies. While freedom as the ratio essendi of the moral law is actual, freedom as a postulate is a mere object of belief. (shrink)

The political legacy of classical German philosophy can contribute in a crucial way to the most recent developments of contemporary political thought, thereby also making sense of the contradictions underlying the social practices and institutional values of our societies. What justifies this perspective is, in the first place, the complexity of contemporaneity, which holds within itself a doubleness that can be understood in the light of the conceptual tools of classical German philosophy. On the one hand, contemporary societies seem to (...) be facing relentless crises in the modern idea of democracy, the political subject of the nation-state, and capitalist economic structures. On the other hand, there is an ever-increasing demand for rights and new forms of recognition, not to mention the emergence of grassroots movements that strive for greater political participation and generate new collective subjectivities. By radically questioning traditional philosophical categories, Kant, Fichte and Hegel provide a new and insightful understanding of the crucial challenges of modernity. They outline a conception of practical rationality and its multiple manifestations that is irreplaceable for philosophically understanding our contemporary world. (shrink)

Previously published as special issues of _The European Journal of the History of Economic Thought_ and _The Review of Political Economy_, this volume contains the papers devoted to the life and work of Piero Sraffa. Sraffa was a leading intellectual of the twentieth century. He was brought to Cambridge by John Maynard Keynes and had an important impact on the philosopher Ludwig Wittgenstein. He received the golden medal Söderström of the Swedish Academy of Sciences for his edition of David Ricardo's (...) _Works and Correspondence_ and he is the author of _Production of Commodities by Means of Commodities_, one of the most often cited book in economics. Using hitherto unpublished material from Sraffa's literary heritage kept at Trinity College, Cambridge, the papers throw new light on the intellectual development of the young Sraffa and correct several of the received views on him and his contribution. Themes covered concern his: objectivism rediscovery and reformulation of the classical theory of value and distribution criticism of Alfred Marshall's analysis relationship with his Cambridge colleagues and friends biography around the time when he left Italy for the UK friendship with Wittgenstein and his impact on the latter's thinking. (shrink)

From the Proceedings of the meeting Mind and Life XII, 'What is matter, what is life?', held in Dharamsala, India, in 2002, in the presence of His Holiness the XIV Dalai Lama.

One of the main goals of scientific research is to provide a description of the empirical data which is as accurate and comprehensive as possible, while relying on as few and simple assumptions as possible. In this paper, I propose a definition of the notion of few and simple assumptions that is not affected by known problems. This leads to the introduction of a simple model of scientific progress that is based only on empirical accuracy and conciseness. An essential point (...) in this task is the understanding of the role played by measurability in the formulation of a scientific theory. This is the key to prevent artificially concise formulations. The model is confronted here with many possible objections and with challenging cases of real progress. Although I cannot exclude that the model might have some limitations, it includes all the cases of genuine progress examined here, and no spurious one. In this model, I stress the role of the state of the art, which is the collection of all the theories that are the only legitimate source of scientific predictions. Progress is a global upgrade of the state of the art. (shrink)

The concepts of molecular structure and molecular shape are ubiquitous in the chemical literature, where they are often taken as synonyms, with unavoidable drawbacks in chemistry teaching. A third concept, molecular topology, is less frequent but it is a reference term in molecular research domains such as Quantitative Structure–Activity Relationships. The present paper proposes an epistemological analysis of these three notions, aimed at clarifying the nature of their relationship, as well as the contiguities and differences between them. At first, we (...) discuss the various acceptations of the terms molecular structure and molecular shape. Then, we examine some crucial milestones in the history of these concepts and we analyse the relationship between structure, shape and topology from an epistemological viewpoint. We point out the distinguishing features of each concept and we show that their semantic openness, that may be fruitful in a specialized context, turns into a source of incoherence and inaccuracy in the teaching context, fostered by the misleading use of these terms made by textbooks. Eventually, we propose a criterion fit to discriminate between the conceptual domains of molecular shape, molecular structure and molecular topology. (shrink)

The present article studies the theological work of Angel Antón . The author researches into the writings of the Gregorian University ecclesiologist, to survey the main points of his ecclesiology. Above all, he focuses on Antón's attention to the post-conciliar period, when the Jesuit theologian entered into the debate about the reception of Vatican II, forthrightly revealing his position regarding an ecclesiology of communion. The result is a new portrait of an exegete of the Council, engaged in renewing the ecclesiology (...) that he elaborated around the idea of Church as «mystery of communion». (shrink)

The essay has as its main theme proposition 6.5 of Wittgenstein’s Tractatus logico-philosophicus and, in particular, its second paragraph "The riddle does not exist". In the first section, the notion of riddle is compared with that of problem, emphasising, among other things, the great relevance that, for Wittgenstein, the distinction between problems of philosophy and problems of natural science has; in the second, an attempt is made to clarify the meaning that Wittgenstein assigns to the word “riddle”: a riddle would (...) be a question “in the void”, without any “direction”, that is, so to speak, a question that does not know what it is asking. This means that, even if it presents itself as a question, the riddle is a non-question. The third section highlights how the denial that there is the enigma is complementary to the denial, so characteristic of the Tractatus, that there are a priori true thoughts or propositions. (shrink)

The essay is dedicated to war considered through the reflections of Roger Caillois and in particular through certain motifs – feast, sacred, vertigo – that allow us to grasp its ‘metaphysical’ intention, i.e. capable of looking at war as the point of chiasmatic reversibility of life and death.

This essay analyses some remarks of Wittgenstein’s On Certainty in which Wittgenstein compares human behaviour to that of animals and says he wants to consider man as an animal. The essay’s main purpose is to show that these remarks are essentially understood as part and parcel of what Wittgenstein calls “conceptual investigations” and that, consequently, they give little support to On Certainty’s naturalistic interpretations. A second purpose of the essay is to show that Wittgenstein does not intend to combat the (...) use of “I know” in contexts such as those evoked by Moore; rather he wants to draw attention to the different ways in which we say or can say “I know.”. (shrink)

"Results presented in two international seminars held in Palermo and Milan in 2012"--Page 1.

Spatial memory relies on encoding, storing, and retrieval of knowledge about objects’ positions in their surrounding environment. Blind people have to rely on sensory modalities other than vision to memorize items that are spatially displaced, however, to date, very little is known about the influence of early visual deprivation on a person’s ability to remember and process sound locations. To fill this gap, we tested sighted and congenitally blind adults and adolescents in an audio-spatial memory task inspired by the classical (...) card game “Memory.” In this research, subjects had to find pairs among sounds displaced on an audio-tactile device composed of loudspeakers covered by tactile sensors. To accomplish this task, participants had to remember the spatialized sounds’ position and develop a proper mental spatial representation of their locations. The test was divided into two experimental conditions of increasing difficulty dependent on the number of sounds to be remembered. Results showed that sighted participants outperformed blind participants in both conditions. Findings were discussed considering the crucial role of visual experience in properly manipulating auditory spatial representations, particularly in relation to the ability to explore complex acoustic configurations. (shrink)

Este trabajo analiza el significado metafísico y metaliterario de la estética de la repetición en la obra narrativa de Borges. Los espejos, las sombras, los fantasmas, los dobles y todas las otras estrategias de repetición de la realidad eran, para él, alegorías de la escritura. Borges utilizó estos mecanismos como “yescas” narrativas —en el sentido barthesiano de la palabra—, para presentar tanto la compleja noción de “los diversos tiempos del tiempo” como su idea de la literatura como “ficción”.

"Depuis une quinzaine d'années, les études sur Montesquieu se sont profondément renouvelées. Le corpus lui-même, grâce aux OEuvres complètes en cours, et notamment avec la première publication intégrale du manuscrit de travail de L'Esprit des lois, offre des perspectives inédites. Mais c'est aussi l'approche même qui a changé : la diversité des questions et des thèmes que son oeuvre permet d'aborder élargit le champ de la recherche, de la philosophie morale et politique à l'histoire ou l'anthropologie, ou encore à la (...) pensée du droit et de la société. Ce volume en tire méthodiquement les conséquences. Dans la perspective de l'édition critique des OEuvres complètes de Montesquieu, c'est à une relecture non pas radicale, mais en finesse et en profondeur qu'invite ce volume, en développant le rapport entre l'homme et la société, en redessinant la relation aux grands massifs de la tradition philosophique d'une pensée dont on suit jusqu'à son terme la logique, en suggérant des relations inédites à travers des rapprochements qui s'imposent, mais n'avaient pourtant guère été faits : ce qui restait informe ou informulé s'est éclairé, ce dont on devinait l'importance s'est approfondi. Ensuite, que restera-t-il à (re)lire? L'Esprit des lois."--Page [4] de la couverture. (shrink)

In questo contributo vengono indagati alcuni concetti della teologia aristotelica (il concetto di divino e quello di trascendenza) a partire da un’espressione emblematica utilizzata dallo storico francese Étienne Gilson per descrivere il Primo Motore Immobile aristotelico: “centrale elettrica della natura”. L’espressione del noto studioso non è soltanto particolarmente accattivante, ma risulta essere filosoficamente assai significativa poiché veicola perfettamente il significato che assume il Dio di Aristotele nell’economia complessiva del cosmo, più in particolare nel ciclo eterno delle corruzioni e delle generazioni. (...) La ricostruzione storica è finalizzata a mostrare la novità del messaggio cristiano contenuto nella Rivelazione e che trova nelle pagine di Tommaso d’Aquino una chiarezza concettuale, filosofico-metafisica, di eccezionale valore. In esse è possibile osservare la piena maturazione della nuova visione di tipo creazionista (basata sulla Metafisica dell’Esodo 3,14) che, pur in continuità con la visione aristotelica, ne approfondisce smisuratamente i presupposti metafisici. (shrink)

This article explores the early biogeographical debates that shaped the beginning of limnology, focusing on the differences of opinion concerning the origins of pelagic fauna between two pioneering scientists: Pietro Pavesi and François-Alphonse Forel. The study examines how Pavesi’s hypothesis of a marine origin for pelagic fauna contrasts with Forel’s theory of passive distribution, situating their arguments within a broader Darwinian framework. The first part of the paper provides a historical overview of Italian limnology, highlighting Pavesi’s contributions and interpreting Forel’s (...) writings to underscore the significance of discovering pelagic fauna in conceptualizing lakes as microcosms. The second part compares Pavesi’s and Forel’s hypotheses, emphasizing their impact on the scientific understanding of freshwater ecosystems. The importance of this discovery, in both historical and scientific contexts, lies in recognizing the presence of plankton in lakes as a crucial element for the mature formulation of ecological concepts, such as the ecosystem. (shrink)