The inconsistency between pro-environmental attitudes and behaviours, known as the “attitude-behaviour” gap, is exceptionally pronounced in scenarios associated with “green” choice. The current literature offers numerous explanations for the reasons behind the “attitude-behaviour” gap, however, the generalisability of these explanations is complex. In addition, the answer to the question of whether the gap occurs between attitudes and intentions, or intentions and behaviours is also unknown. In this study, we propose the moral dimension as a generalisable driver of the “attitude-behaviour” gap (...) and investigate its effectiveness in predicting attitudes, pro-environmental intentions and subsequent behaviours. We do so by using Hunt–Vitell’s moral philosophy-based framework of ethical decision-making, which conceptualises morality as the central decision-making parameter. The results from 557 US MTurk participants revealed that the manipulation of moral dimensions, specifically deontology and teleology, impacted ethical evaluation of presented dilemmas, however, failed to translate into subsequent intentions and behaviours. This finding suggests (i) that the moral dimension has an effect in shaping attitudes toward environmental issues, and (ii) that gap occurs between attitudes and intentions rather than intentions and behaviours. Further investigation of what strengthens and/or overrides the effects of the moral dimension would help understand the reasons why moral attitudes do not always translate into subsequent intentions and behaviours in the pro-environmental domain. (shrink)

This innovative book takes a new look at environmental ethics and the need for ecological and biological integrity. Laura Westra explores the necessity for radical alteration not only of interpersonal ethics, but also of social institutions and public policy. In the process, Westra denies the validity of majority rule in environmentally ethical concerns. Issues discussed in the book include the link between ecological integrity and human health; an environmental evaluation of business and technology; biotechnology and transgenics in agriculture and (...) aquaculture; and the environmental ethics of the ancient Greeks and Kant. Living in Integrity is a valuable book for philosophers and environmentalists alike. (shrink)

'This original discussion breaks new ground by thoroughly analyzing ethical and aesthetic values, centering on the concept of ecological integrity, that apply intrinsically to nature and that govern our rightful use of the environment. Those who have been waiting for an exciting account of the inherent structure and worth of ecological systems in relation to environmental policy will find it in this book.'-Mark Sagoff, Director of the Institute for Philosophy and Public Policy, University of Maryland at College Park.

The informed consent process for genetic testing does not commonly address preferences regarding disclosure of results in the event of the patient's death. Adults being tested for familial colorectal cancer were asked whether they want their exome sequencing results disclosed to another person in the event of their death prior to receiving the results. Of 78 participants, 92% designated an individual and 8% declined to. Further research will help refine practices for informed consent.

Camp (2009) distinguishes two varieties of conceptual recombination. One of them is full-blown or (as I prefer to call it) spontaneous recombination. The other is causal-counterfactual recombination. She suggests that while human animals recombine their concepts in a full-blown way, many non-human animals are capable of conceptual recombinability but only of the causal-counterfactual kind. In this paper, I argue that there is conceptual space to draw further sub-distinctions on how different animals may recombine their concepts. More specifically, I propose to (...) differentiate between a) narrow causal-counterfactual recombination; b) broad causal-counterfactual recombination; c) lean spontaneous recombination; d) robust spontaneous recombination. Afterwards, I focus on how these distinctions relate to several previous philosophical ideas on the representational capacities of non-human animals. I also provide several empirical examples suggesting that some animals display one or another of these four ways of recombining concepts, at least in some contexts. (shrink)

ABSTRACTRecent research suggests that impaired emotion regulation may play an important role in the development of youth psychopathology. However, little research has explored the effects of ER strategies on affect in early adolescents. In Study 1, we examined if early adolescents are able to use distraction and whether the effects of this strategy are similar to talking to one’s mother. In Study 2, we compared the effects of distraction, cognitive reappraisal, acceptance, and rumination. In both studies, participants received instructions on (...) how to regulate their emotions after a standardised negative mood induction. In general, the results indicated that distraction, but also cognitive reappraisal and acceptance, had promising short-term effects on positive and negative affect in early adolescents. These findings suggest that targeting adaptive ER skills, such as distraction, acceptance, and cognitive reappraisal, may be an important strategy to prevent or treat psychological pro... (shrink)

Recent work in animal ethics has advanced principles that are too individualistic to be compatible with a holistic environmental ethic such as the land ethic proposed by Aldo Leopold. J. Baird Callicott, on the other hand, has attempted to reconcile the two ethics by suggesting that sympathy, natural among humanity, as he claims on Humean grounds, does not necessarily terminate at the species barrier. His argument shows minimally that it is not necessary that we abandon ecological ethics in order to (...) view nonhuman animals as morally considerable. I argue instead that it is not sympathy, but hostility/indifference that manifests the reality of life in wild nature, and as such forms a better basis for an all-encompassing ethic. If one accepts that the factual realm suggests the limits of norms and establishes the background and context of normative judgments in this context (as Holmes Roiston, III, for instance, does), then a different line of argument can be developed. I argue that intraspecies and interspecies ethics ought to be different for us because behavior in the wild is different within and without a species. Further, I argue that hostility/indifference coupled with respect form the basis of an approach which embraces a holistic environmental ethic as weil as one concemed with nonhuman animals. (shrink)

Drawing on the built environment concept of “inclusive design” and its emphasis on creating accessible environments for all persons regardless of ability, I suggest that a central task for feminist disability theory is to redesign foundational philosophical concepts to present opportunities rather than barriers to inclusion for people with disability. Accounts of autonomy within liberal philosophy stress self-determination and the dignity of all individual persons, but have excluded people with intellectual disability from moral and political theories by denying their capacity (...) for individual autonomy, seen as a chief marker of moral personhood. This paper modifies and extends feminist theories of relational autonomy by arguing for the need to view autonomy as a feature of persons that is manifested only through relations of support, advocacy, and enablement. An “inclusively designed,” relational account negotiates the tensions encountered in attempts to apply autonomy to people with high support needs, and politicizes the concept as an advocacy tool for people with intellectual disability and their allies. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Searching for Peace in DeathLaura WachsmuthDisclaimers. No funding was utilized for this manuscript. The author, Laura Wachsmuth, has worked at several hospitals. The opinions contained herein are her own. All names have been changed to protect the privacy of the patient and the patient's family.I first met Ellen when she was admitted to the Women and Infant unit on a late spring day in May. She was 27 (...) weeks pregnant and was experiencing intense abdominal pain.As a hospital chaplain, I support patients and their families emotionally and spiritually. Sometimes, this looks like praying with patients; other times, it looks like sitting in quiet because there are no adequate words. Over time, I have developed ways to help me cope with the intensity I witness daily. Still, cases come up that I must grieve. The case of Ellen is one such example.The first time I met Ellen, she was waiting to hear back about her scans and tests. A quick look at her chart and a conversation with the medical team revealed that she was in her mid-thirties. While she spoke English fluently, she had immigrated to the US, and English was her second language. She, along with her husband, Mark, and their young son, had come to the United States on a work visa.After knocking on the door and entering her dim hospital room, I noticed right away what a beautiful person Ellen was, inside and out. Lying in bed, her long dark hair piled up on her head, her slim figure was visibly pregnant underneath her hospital gown. She smiled and gently greeted me. Mark was at her side. Clearly, Ellen was in physical pain, and while she and Mark still hoped the doctors were wrong in thinking she may have cancer, the emotional strain of waiting lay heavy upon them.Ellen and Mark kindly welcomed me and were attentive as best they could as I introduced myself and explained my role as a chaplain. They told me [End Page 75] that they were spiritual, not religious, but welcomed chaplain visits. Both exuded a certain peace and kindness, which was striking considering all they were enduring.As Ellen and her family waited for the results to come back, I waited as well and frequently checked her medical chart, looking for updates. About a week after she was first admitted, the medical team broke the dreaded news: Ellen had stage IV gastric cancer; it was estimated she only had 11 months to live. At this point, the Palliative Care team became involved in Ellen's care, and the chaplain on this team supported Ellen through the shock of her diagnosis and the difficult treatment choices she faced.Originally, the plan was for Ellen to deliver her daughter at 29–30 weeks and then to receive 2–3 rounds of chemotherapy. After further deliberation, however, it was decided that it was riskier to deliver a baby at 29–30 weeks than it was to undergo chemotherapy while pregnant, so Ellen began chemotherapy while still carrying her baby. Her chemotherapy was not a curative treatment, but there was hope it might give her more time.While my role became more peripheral at this point, I continued visiting Ellen. She was often tired or in pain, so I was mindful to keep my visits short. Mark, who stayed with his wife day in and day out, was usually in the room when I came by, and I often inquired after his well-being. Since Ellen and Mark's families still lived abroad, Mark was Ellen's primary support, and needed care and support himself.After two rounds of chemotherapy, Ellen made the decision to stop treatments. She made this decision because she was concerned about the risks of chemotherapy on her baby. It was an agonizing decision, and even after she made it, Ellen turned it over in her mind. During one of our visits, she asked me if I thought she had made the right decision. I told her that I fully supported her, but as I left her room, I wondered if I had done the right thing in affirming her choice. Looking... (shrink)

Although canine identification of body odor (BO) has been widely used as forensic evidence, the concept of nosewitness identification by human observers was only recently put to the test. The results indicated that BOs associated with male characters in authentic crime videos could later be identified in BO lineup tests well above chance. To further evaluate nosewitness memory, we assessed the effects of lineup size (Experiment 1) and retention interval (Experiment 2), using a forced-choice memory test. The results showed that (...) nosewitness identification works for all lineup sizes (3, 5, and 8 BOs), but that larger lineups compromise identification performance in similarity to observations from eye- and earwitness studies. Also in line with previous eye- and earwitness studies, but in disagreement with some studies on odor memory, Experiment 2 showed significant forgetting between shorter retention intervals (15 min) and longer retention intervals (1-week) using lineups of five BOs. Altogether this study shows that identification of BO in a forensic setting is possible and has limits and characteristics in line with witness identification through other sensory modalities. (shrink)

Todo Estado de Derecho moderno tiene su fundamento en ciertos principios que rigen la manera en cómo se ejerce el Poder Público, y es el modo en que efectivamente se aplican, lo que ciertamente determinará la naturaleza y característica de dicho Estado. En el caso venezolano, tales principios se encuentran expresamente plasmados en nuestra Carta Magna y son: El principio de competencia administrativa, el principio de legalidad, el principio de separación y colaboración entre los poderes y el principio de responsabilidad (...) del Estado y sus funcionarios. La intención es definir y desarrollar brevemente estos principios, a fin de poder establecer las características del Estado Venezolano, desde el punto de vista Constitucional (positivo) y desde el punto de vista real. Palabras clave: Principios constitucionales; Responsabilidad del Estado; Competencia; Legalidad; Separación de poderes. Constitutional principles concerning the exercise of public power.Every modern law-ruled State has its foundation on certain principles which govern theway Public Power is exercised. It is the manner in which those principles are in fact applied what will actually determine the nature and characteristics of such a State. In Venezuela’s case such principles are explicitly presented in our Constitution. They are: the principle of administrative competence, the principle of legality, the principle of separation and cooperation between powers and the principle of responsibility of the State and its officials. The aim is to define and briefly unfold these principles, so as to establish the characteristics of the Venezuelan State, both from the Constitutional (positive) and reality standpoints. Keywords : Constitutional Principles; State Responsibility; Competence; Legality; Separation of Powers. (shrink)

Interactions with yellowjackets offer opportunities to reflect on what it is to encounter radical alterity and the conditions that are necessary for the limited empathy such encounters afford us. Effort must be made to set aside automatic judgments, and neither simulation nor theorizing can be sufficient to give us reliable insights, but mindful attentiveness can at least help us attend to the possibilities of interaction and tentative interpretation.

This essay compares Sikh and Christian thought about and practices of hospitality in light of the global refugee crisis. It aims to show how both practices of hospitality, and religious ethical thought about hospitality, can be enhanced by dialogue between traditions. The refugee crisis arises out of a global failure of hospitality, and the type of hospitality refugees most fundamentally need is that which confers membership in a political community. Comparing Christian and Sikh ethics of hospitality provides guidance toward building (...) rooted religious communities that welcome outsiders, including by incorporating them into political communities. In particular, Christians who hold social power and privilege can better fulfill ethical mandates of hospitality by looking to the example of Sikhs and other marginalized groups. Sikhs have often built communities through acts of hospitality and welcomed outsiders without fear, even in contexts where their own belonging is questioned and their own security is under threat. (shrink)

Background: The concept of dignity can be divided into two main attributes: absolute dignity that calls for recognition of an inner worth of persons and social dignity that can be changeable and can be lost as a result of different social factors and moral behaviours. In this light, the nursing profession has a professional dignity that is to be continually constructed and re-constructed and involves both main attributes of dignity. Objectives: The purpose of this study was to determine how nurses (...) described nursing’s professional dignity in internal medicine and surgery departments in hospital settings. Research design: The research design was qualitative. Ethical considerations: This study was approved by the ethics committees of the healthcare organizations involved. All the participants were provided with information about the purpose and the nature of the study. Participants: A total of 124 nurses participated in this study. Method: The data were collected using 20 focus group sessions in different parts of Italy. The data were analysed by means of a conventional inductive content analysis starting from the information retrieved in order to extract meaning units and sorting the arising phenomena into conceptually meaningful categories and themes. Results: Nursing’s professional dignity was deeply embedded in the innermost part of individuals. Regarding the social part of dignity, a great importance was put on the values that compose nursing’s professional identity, the socio-historical background and the evolution of nursing in the area considered. The social part of dignity was also linked to collaboration with physicians and with healthcare assistants who were thought to have a central role in easing work strain. Equally important, though, was the relationship with peers and senior nurses. Conclusion: The organizational environments under scrutiny with their low staffing levels, overload of work and hierarchical interactions did not promote respect for the dignity of nurses. To understand these professional values, it is pivotal to comprehend the role of different health professions in their cultural milieu and the evolution of the nursing profession in diverse countries. (shrink)

The concept offreedom in Heidegger’s sense of truth or unconcealedness of beings may be applied to future generations without thereby reducing the status of other elements within the environment to mere means, since Da-sein’s approach as one who is a caring and concernful, anxious and aware of its own death in an authentic manner, does not place man in any sense “above” other things. This care (Sorge), concern, favor can be captured in Heidegger’s remark that man is not the lord (...) of beings, but rather is “the Shepherd of Being.” Accordingly. we may be able to learn to moderate our ordering andcommanding attitude and learn to “listen” and free beings. letting them be what they truly are. If so, we might then require no special justification in order to extend toward earth, sky, and future persons the same understanding and freeing concern we normally give to, and wish for ourselves. (shrink)

Medical advances in transplantation techniques have driven an exponential increase in the demand for transplantable organs. Unfortunately, policy efforts to bolster the organ supply have been less than effective, failing to provide a stopgap for ever-increasing numbers of patients who await organ transplantation. The number of registrations on waiting lists exceeded 65,245 in early 1999, a 325% increase over the 20,000 that existed 11 years earlier in 1988. Regrettably, more than 4,000 patients die each year while awaiting transplantation.

Philosophers have understood propositional contents in many different ways, some of them imposing stricter demands on cognition than others. In this paper, I want to characterize a specific sub-type of propositional content that shares many core features with full-blown propositional contents while lacking others. I will call them modest propositional contents, and I will be especially interested in examining which behavioral patterns would justify their attribution to non-human animals. To accomplish these tasks, I will begin by contrasting modest propositional contents (...) with primitive feature-placing contents: a kind of content that, according to some philosophers, can explain the behavior of non-human animals. I will examine which cognitive abilities are involved in having mental states with each of these contents and which sorts of behavioral patterns would provide evidence that an animal has one of them or another. Finally, I will present some empirical evidence which strongly suggests that some non-human animals have mental states with modest propositional contents. (shrink)

This essay is devoted to the study of proper names. Although the view that sees proper names as referential singular terms is widely considered orthodoxy, there is a growing popularity to the view that proper names are predicates. This is partly because the orthodoxy faces two anomalies that Predicativism can solve: on the one hand, proper names can have multiple bearers. But multiple bearerhood is prima facie a problem to the idea that proper names have just one individual as referent. (...) On the other hand, proper names can have predicative uses. But the view that proper names are singular terms arguably does not have the resources to deal with these uses. In this dissertation I argue that the Predicate View of proper names is mistaken. In the first part of the thesis, I analyse this view in its main contentions and offer several arguments to reject it. This critical exercise provides useful insight into the life of proper names that I incorporate in my own view as follows: I argue that the behaviour of proper names should be understood in light of the wider phenomenon I call category change. Thus, I maintain, with orthodoxy, that proper names are fundamentally referential terms, but I also argue that they also have other uses, including the predicative uses highlighted by the predicativist. I also offer a semantic theory according to which proper names are polyreferential, that is, they are terms that can have more than one referent in a way that is distinct from both plural terms and general terms. This theory resolves the problem of multiple bearerhood and provides a base to account for all other uses of proper names that are not referential, i.e., common noun, adjectival and verbal uses, as semantically derived from the more fundamental referential meaning. (shrink)

Machine generated contents note: -- List of IllustrationsAcknowledgementsIntroductionImmanent authorship: From the Living Theatre to Cage and Goat IslandDisorganizing language, voicing minority: From Artaud to Carmelo Bene, Robert Wilson & Georges LavaudantImmanent imitations, animal affects: From Hijikata Tatsumi to Marcus CoatesPaying attention, participating in the whole: Allan Kaprow alongside Lygia ClarkEthical durations, opening to other times: Returning to Goat Island with WilsonIn-Conclusion: What 'good' is immanent theatre? Immanence as an ethico-aesthetic valueCodaBibliographyIndex.

This paper compares Kant's positions on space, time, the relational character of noumena, and the relational character of the self, with the somewhat similar accounts of those things in two philosophers of the Kyoto school: Keiji Nishitani and Nishida Kitaro. I will argue that the philosophers of the Kyoto school had a more coherent and better integrated account of those ideas, that was open to Kant. I think that the comparison both clarifies Kant's position on these topics, and elucidates the (...) topics. (shrink)

Public policy on alcohol in the UK relies on health promotion campaigns that encourage individuals who misuse alcohol to make healthier choices about their drinking. Individuals with alcohol-dependence syndrome have an impaired capacity to choose health. As a result, individuals with the worst alcohol misuse problems lie largely outside the reach of choice-based policy. However, such policy has been widely criticized and efforts to reform it are underway. This paper argues that the British Medical Association's recent attempt to improve policy (...) on alcohol in the UK by introducing strategies which have been shown to control drinking within populations still gives insufficient attention to alcohol dependence. This is because it fails accurately and consistently to characterize alcohol dependence and gives insufficient attention to the social challenges it presents. (shrink)

Despite the secularization process, popular religion in modern or post-modern societies still retains a central role. In this article, we analyze the worship of Santa Rosalia and Mamma Schiavona. The former is worshiped by Romani and Tamil people; the latter, the Mary of Montevergine Sanctuary, is also venerated by groups of homosexuals and transsexuals. The reworking of religious categories made by these subaltern groups reminds us of the dynamic nature of Catholicism, which changes thanks to continuous contact with external and (...) internal elements. Through Gramsci’s interpretation of popular religion as a symbolic instrument of social recognition and affirmation in opposition to the hegemonic culture, we demonstrate that popular religion plays a central social role in the construction of worldviews, sometimes in contrast with the hegemonic culture, not only as an affirmation of a different identity but as an affirmation of presence. (shrink)

Drawing upon lived experiences, this article explores challenges facing feminist academics sharing work in the media, and the gendered, raced intersections of ‘being visible’ in digital cultures which enable direct, public response. We examine online backlash following publication of an article about representations of Meghan Markle’s feminism being co-opted by the patriarchal monarchy. While in it we argued against vilification of Markle, we encountered what we term distortions of research remediation as news outlets reported our work under headlines such as (...) ‘academics accuse Meghan of dropping feminism like a hot potato’. Negative responses were polarised: anti-Meghan, and pro-Meghan. In response, we received accusations of sexist, racist bullying, debate over definitions of feminism, claims feminism has gone ‘too far’, variously worded directives to ‘shut up’, gendered personal insults, and threats of doxxing. This article examines the tenor of public discourse around feminism and visible feminists. It questions the responsibility of institutions benefiting from public intellectuals for the wellbeing of employees in the public eye, particularly in the anti-intellectual socio-political context of Brexit and Donald Trump, where the costs for ‘visible’ women and feminist activism are ever higher. It also considers our responsibility as researchers to ensure our contributions to public discourse do not exacerbate existing harms of a white-supremacist, classist society. This article interrogates the risks – of misrepresentation, hyper-visibility, and reputational, psychological and potentially physical harm – faced by those engaging in acts of public feminism. (shrink)

This article places Foucault's 1977 suggestions regarding the reform of French rape law in the context of ongoing feminist debates as to whether rape should be considered a sex crime or a species of assault. When viewed as a disciplinary matrix with both physical and discursive effects, rape and the rape trial clearly contribute to the “hysterization” of women by cultivating complainants' confessions in order to demonstrate their supposed lack of self-knowledge.

This is the first of a two-part introduction to some interpretive questions that arise in connection with quantum field theories (QFTs). Some of these questions are continuous with those familiar from the discussion of ordinary non-relativistic quantum mechanics (QM). For example, questions about locality can be rigorously posed and fruitfully pursued within the framework of QFT. A stark disanalogy between QFTs and ordinary QM – the former, but not the latter, typically admit infinitely many putatively physically inequivalent realizations – prompts (...) relatively novel questions, questions about how to understand and adjudicate different strategies for equipping quantum theories with content. Part I sketches the fate of locality and related notions in QFT, then documents the non-uniqueness unprecedented in ordinary QM but rampant in QFT. Part II presents foundations issues raised by non-uniqueness. (shrink)

Certification programs seek to promote decent work in global agriculture, yet little is known about their gender standards and implications for female workers, who are often the most disadvantaged. This study outlines the gender standard domains of major agricultural certifications, showing how some programs (Fair Trade USA, Rainforest) prioritize addressing gender equality in employment and others (Fairtrade International, UTZ) incorporate wider gender rights. To illuminate the implications of gender standards in practice, I analyze Fairtrade certification and worker experience on certified (...) flower plantations in Ecuador, drawing on a qualitative and quantitative field research study. (1) I show how Fairtrade seeks to bolster the wellbeing of female workers, addressing their workplace needs via equal employment, treatment, and remuneration standards and their reproductive needs via maternity leave and childcare services. My research demonstrates that for female workers, addressing family responsibilities is critical, since they shape women’s ability to take paid jobs, their employment needs, and their overall wellbeing. (2) I show how Fairtrade seeks to bolster the rights of women workers through individual and collective capacity building standards. My findings reveal how promoting women’s individual empowerment serves as a precondition for collective empowerment, and how targeting traditional labor rights is insufficient for empowering female workers, since their strategic choices are curtailed largely outside the workplace. While Fairtrade certification bolsters the wellbeing and rights of female workers in and beyond the workplace, much still needs to be done before women can claim their rights as workers and citizens. (shrink)

In this paper I will present the accounts of two influential contemporary moral philosophers, Grace Clement and Amartya Sen, to argue for the social context and inter-related nature of autonomy. In fact, there can be no autonomy for anyone without a loving and caring social environment that actively promotes independent thinking and capacity empowerment among people. This social dimension of autonomy has often been ignored by traditional theorists, who have considered autonomy to be an individual accomplishment that is a function (...) of an individual's will power, intellectual ability, or self-discipline and virtue. (shrink)

William James states “Immortality is one of the great spiritual needs of man,” yet the arguments presented in his LECTURE ON IMMORTALITY, while interesting and ingenious, are somewhat less than conclusive in proving that human beings can survive bodily death. Therefore I attempt to clarity the notion of “individual survivor” through an analysis and discussion of various approaches to the problem, before returning to a further examination of James’ thought in the “Final Impressions of a Psychical Researcher,” the THEORY OF (...) THE SOUL, the PRINCIPLES OF PSYCHOLOGY, the VARIETIES OF RELIGIOUS EXPERIENCE and a PLURALISTIC UNIVERSE. James’ often neglected Christian position provides the key to a better understanding of his thought on the topic, and allows me to conclude on a cautiously optimistic note on the possibility of a philosophical proof for human survival. (shrink)

Explores a Foucaultian understanding of the subject in relation to truth and power.

The thesis examines two dimensions of constructivity that manifest themselves within foundational systems for Bishop constructive mathematics: intuitionistic logic and predicativity. The latter, in particular, is the main focus of the thesis. The use of intuitionistic logic affects the notion of proof : constructive proofs may be seen as very general algorithms. Predicativity relates instead to the notion of set: predicative sets are viewed as if they were constructed from within and step by step. The first part of the thesis (...) clarifes the algorithmic nature of intuitionistic proofs, and explores the consequences of developing mathematics according to a constructive notion of proof. It also emphasizes intra-mathematical and pragmatic reasons for doing mathematics constructively. The second part of the thesis discusses predicativity. Predicativity expresses a kind of constructivity that has been appealed to both in the classical and in the constructive tradition. The thesis therefore addresses both classical and constructive variants of predicativity. It examines the origins of predicativity, its motives and some of the fundamental logical advances that were induced by the philosophical re ection on predicativity. It also investigates the relation between a number of distinct proposals for predicativity that appeared in the literature: strict predicativity, predicativity given the natural numbers and constructive predicativity. It advances a predicative concept of set as unifying theme that runs across both the classical and the constructive tradition, and identifies it as a forefather of a computational notion of set that is to be found in constructive type theories. Finally, it turns to the question of which portions of scientifically applicable mathematics can be carried out predicatively, invoking recent technical work in mathematical logic. (shrink)