Scientific research is almost always conducted by communities of scientists of varying size and complexity. Such communities are effective, in part, because they divide their cognitive labor: not every scientist works on the same project. Philip Kitcher and Michael Strevens have pioneered efforts to understand this division of cognitive labor by proposing models of how scientists make decisions about which project to work on. For such models to be useful, they must be simple enough for us to understand their dynamics, (...) but faithful enough to reality that we can use them to analyze real scientific communities. To satisfy the first requirement, we must employ idealizations to simplify the model. The second requirement demands that these idealizations not be so extreme that we lose the ability to describe real-world phenomena. This paper investigates the status of the assumptions that Kitcher and Strevens make in their models, by first inquiring whether they are reasonable representations of reality, and then by checking the models' robustness against weakenings of these assumptions. To do this, we first argue against the reality of the assumptions, and then develop a series of agent-based simulations to systematically test their effects on model outcomes. We find that the models are not robust against weakenings of these idealizations. In fact we find that under certain conditions, this can lead to the model predicting outcomes that are qualitatively opposite of the original model outcomes. (shrink)

Liberal states traditionally rely on a reasonably narrow set of tools for engaging in social regulation. All of these tools are meant to change individual behaviors. Laws come with implicit force, financial regulations come with monetary carrots and sticks, and information provision informs people of the things that policymakers think they should know. Each of these is meant to guide individual choice making by changing how people evaluate their available options. Because this set of tools is meant to change individual (...) behaviors, it is worth considering what implicit assumptions this set of tools makes about the individuals whose behaviors policymakers are looking to change. Behavioral and social science has not only found some limitations on existing policy tools but has also pointed in the direction of some new tools as well. This is because the model of human choice and behavior is now richer. Nudges and norms provide an expanded toolset for policymakers but raise interesting questions about the legitimacy of the state taking advantage of reductions in agency to achieve policy ends. I argue that this framing misconstrues the situation and suggest that the appropriate guide to any options in the policy tool kit is one of nurturing rather than inhibiting citizen autonomy. Sometimes, this will recommend the use of norms or nudges in place of the standard policy tools. (shrink)

Very diverse societies pose real problems for Rawlsian models of public reason. This is for two reasons: first, public reason is unable accommodate diverse perspectives in determining a regulative ideal. Second, regulative ideals are unable to respond to social change. While models based on public reason focus on the justification of principles, this book suggests that we need to orient our normative theories more toward discovery and experimentation. The book develops a unique approach to social contract theory that focuses on (...) diverse perspectives. It offers a new moral stance that author Ryan Muldoon calls, "The View From Everywhere," which allows for substantive, fundamental moral disagreement. This stance is used to develop a bargaining model in which agents can cooperate despite seeing different perspectives. Rather than arguing for an ideal contract or particular principles of justice, Muldoon outlines a procedure for iterated revisions to the rules of a social contract. It expands Mill's conception of experiments in living to help form a foundational principle for social contract theory. By embracing this kind of experimentation, we move away from a conception of justice as an end state, and toward a conception of justice as a trajectory. (shrink)

Because of its complexity, contemporary scientific research is almost always tackled by groups of scientists, each of which works in a different part of a given research domain. We believe that understanding scientific progress thus requires understanding this division of cognitive labor. To this end, we present a novel agent-based model of scientific research in which scientists divide their labor to explore an unknown epistemic landscape. Scientists aim to climb uphill in this landscape, where elevation represents the significance of the (...) results discovered by employing a research approach. We consider three different search strategies scientists can adopt for exploring the landscape. In the first, scientists work alone and do not let the discoveries of the community as a whole influence their actions. This is compared with two social research strategies, which we call the follower and maverick strategies. Followers are biased towards what others have already discovered, and we find that pure populations of these scientists do less well than scientists acting independently. However, pure populations of mavericks, who try to avoid research approaches that have already been taken, vastly outperform both of the other strategies. Finally, we show that in mixed populations, mavericks stimulate followers to greater levels of epistemic production, making polymorphic populations of mavericks and followers ideal in many research domains. (shrink)

In epistemology and the philosophy of science, there has been an increasing interest in the social aspects of belief acquisition. In particular, there has been a focus on the division of cognitive labor in science. This essay explores several different models of the division of cognitive labor, with particular focus on Kitcher, Strevens, Weisberg and Muldoon, and Zollman. The essay then shows how many of the benefits of the division of cognitive labor flow from leveraging agent diversity. The essay (...) concludes by examining the benefits and burdens of diversity, particularly in the evaluative diversity that can be found in interdisicplinary science. (shrink)

Journal of Political Philosophy, EarlyView.

In this paper we argue that there is a kind of moral disagreement that survives the Rawlsian veil of ignorance. While a veil of ignorance eliminates sources of disagreement stemming from self-interest, it does not do anything to eliminate deeper sources of disagreement. These disagreements not only persist, but transform their structure once behind the veil of ignorance. We consider formal frameworks for exploring these differences in structure between interested and disinterested disagreement, and argue that consensus models offer us a (...) solution concept for disagreements behind the veil of ignorance. (shrink)

A descriptive norm is a behavioral rule that individuals follow when their empirical expectations of others following the same rule are met. We aim to provide an account of the emergence of descriptive norms by first looking at a simple case, that of the standing ovation. We examine the structure of a standing ovation, and show it can be generalized to describe the emergence of a wide range of descriptive norms.

This paper examines a series of Schelling-like models of residential segregation, in which agents prefer to be in the minority. We demon- strate that as long as agents care about the characteristics of their wider community, they tend to end up in a segregated state. We then investigate the process that causes this, and conclude that the result hinges on the similarity of informational states amongst agents of the same type. This is quite di erent from Schelling-like behavior, and sug- (...) gests (in his terms) that segregation is an instance of macro behavior which can arise from a wide variety of micro motives. (shrink)

This paper explores the space of possibilities for public justification in morally diverse communities. Moral diversity is far more consequential than is typically appreciated, and as a result, we need to think more carefully about how our standard tools function in such environments. I argue that because of this diversity, public justification can be divorced from any claim of determinateness. Instead, we should focus our attention on procedures—in particular, what Rawls called cases of pure procedural justice. I use a modified (...) form of the procedure “I cut, you choose” to demonstrate how perspectival diversity can make what looks like a simple procedure quite complex in practice. I use this to reframe disputes between classical liberal and contemporary liberal approaches to questions of public morality, arguing that classically liberal procedures, such as a reliance on the harm principle, can generate rather illiberal-looking outcomes when used in a morally diverse community. A seemingly less-principled approach, which simply balances burdens, appears to generate outcomes that look closer to what we would expect from classical liberalism. However, since both approaches are based on pure procedures that we can justify without reference to outcomes, it remains indeterminate which we ought to choose. (shrink)

In On Liberty, Mill introduced the concept of . I will provide an account of what Mill saw to be the basic problem he was addressing – the extensive pressure to fit in with the crowd, and how this bred mediocrity. I connect this to worries about public reason models of justification. I argue that a generalized version of Mill's argument offers us a better path to political justification stemming from experimentation. Rather than grounding political justification on shared political reasons, (...) we justify our political culture on our ability to reject consensus views and try alternatives. (shrink)

Previous literature has demonstrated the important role that trust plays in developing and maintaining well-functioning societies. However, if we are to learn how to increase levels of trust in society, we must first understand why people choose to trust others. One potential answer to this is that people view trust as normative: there is a social norm for trusting that imposes punishment for noncompliance. To test this, we report data from a survey with salient rewards to elicit people’s attitudes regarding (...) the punishment of distrusting behavior in a trust game. Our results show that people do not behave as though trust is a norm. Our participants expected that most people would not punish untrusting investors, regardless of whether the potential trustee was a stranger or a friend. In contrast, our participants behaved as though being trustworthy is a norm. Most participants believed that most people would punish someone who failed to reciprocate a stranger’s or a friend’s trust. We conclude that, while we were able to reproduce previous results establishing that there is a norm of reciprocity, we found no evidence for a corresponding norm of trust, even among friends. (shrink)

As scientists begin to study increasingly complex questions, many have turned to computer simulation to assist in their inquiry. This methodology has been challenged by both analytic modelers and experimentalists. A primary objection of analytic modelers is that simulations are simply too complicated to perform model verification. From the experimentalist perspective it is that there is no means to demonstrate the reality of simulation. The aim of this paper is to consider objections from both of these perspectives, and to argue (...) that a proper understanding and application of robustness analysis is able to resolve them. ‡The author would like to thank Cristina Bicchieri, Michelle Foa, Paul Humphreys and Michael Weisberg for their helpful comments and suggestions. †To contact the author, please write to: Department of Philosophy, University of Pennsylvania, 433 Logan Hall, 249 S. 36th Street, Philadelphia, PA, 19104-6304; e-mail: [email protected]. (shrink)

In this work, we present a mathematical model for the emergence of descriptive norms, where the individual decision problem is formalized with the standard Bayesian belief revision machinery. Previous work on the emergence of descriptive norms has relied on heuristic modeling. In this paper we show that with a Bayesian model we can provide a more general picture of the emergence of norms, which helps to motivate the assumptions made in heuristic models. In our model, the priors formalize the belief (...) that a certain behavior is a regularity. The evidence is provided by other group members’ behavior and the likelihood by their reliability. We implement the model in a series of computer simulations and examine the group-level outcomes. We claim that domain-general belief revision helps explain why we look for regularities in social life in the first place. We argue that it is the disposition to look for regularities and react to them that generates descriptive norms. In our search for rules, we create them. (shrink)

A core set of assumptions in economic modeling is that rational agents, who have a defined preference set, assess their options and determine which best satisfies their preferences. The rational actor model supposes that the world provides us with a menu of options, and we simply choose what’s best for us. Agents are independent of one another, and they can rationally assess which of their options they wish to pursue. This gives special authority to the choices that people make, since (...) they are understood to be the outcomes of the agent’s considered judgments. However, we have come to see that the independence assumption does not always hold in the way that we may have initially thought. Social norms can govern our choices even when we disagree with them. Here we can begin to see how the standard model of choice and agency begins to weaken: no longer are my choices wholly mine, but instead there is a subset of choices that are governed by the broader culture that I live in. Social norms constrain my behavior with informal coercion — my desire to remain a community member in good standing requires me to behave in accordance with the community’s social norms. What I wish to challenge more substantively is the claim that the menu of choices agents “see” is in fact the objective set of options that is transparently provided by the world. Instead, I argue that the options that people perceive and the evidence they use to make choices are mediated by perspectives. Perspectives can importantly interact with social norms to make some norms more resilient to change, and others harder to adopt. This further shapes both our descriptive and normative understanding of agency. Our choices are not over all of the objectively available options, but over the options that we can see. The evidence we marshal to support our choices is not the full set of evidence, but the evidence that we recognize as salient. This is not to deny that individuals have agency, but rather we need a more nuanced understanding of the nature of this agency. (shrink)

The philosophical tradition of liberal political thought has come to see tolerance as a crucial element of a liberal political order. However, while much has been made of the value of toleration, little work has been done on individual-level motivations for tolerant behavior. In this article, we seek to develop an account of the rational motivations for toleration and of where the limits of toleration lie. We first present a very simple model of rational motivations for toleration. Key to this (...) model is an application of David Ricardo’s model of trade to thinking about toleration. This model supports the claim that we always have reasons to be as tolerant as possible. We then explore why we do not always see tolerant attitudes in the actual world, and point to some potential preconditions for toleration that the initial model does not capture. Subsequently, we examine a more detailed model that allows us to investigate more carefully the conditions under which tolerant behavior can be rewarded. We conclude by arguing that a consideration of self-interested motivations for toleration is essential to the success of a robust theory of toleration for a diverse society, but that even this approach has its limitations. (shrink)

It is well-known that people will adjust their first-order beliefs based on observations of others. We explore how such adjustments interact with second-order beliefs regarding universalism and relativism in a population. Across a range of simulations, we show that populations where individuals have a tendency toward universalism converge more quickly in coordination problems, and generate higher total payoffs, than do populations where individuals have a tendency toward relativism. Thus, in contexts where coordination is important, belief in universalism is advantageous. However, (...) we also show, across a range of simulations, that universalism will enshrine inequalities and eliminate diversity, and in these cases it seems that relativism has its own advantages. (shrink)

The article makes two substantive contributions to the existing literature on the ethics of international assistance and global justice. First, it builds what we take to be a widely held set of propositions about international assistance into a consistent view, and articulates a strong case against its desirability. Second, it sketches a more attractive alternative. To do so the article uses Sen’s idea of agent-oriented development as a starting point while at the same time providing a generalization of Sen’s account (...) and a justificatory framework that does not rely on the capability approach. (shrink)

In Trust in a Polarized Age, Kevin Vallier gives himself the unenviable and yet essential task of diagnosing and responding to the problem of democratic governa.

This article examines a series of Schelling-like models of residential segregation, in which agents prefer to be in the minority. We demonstrate that as long as agents care about the characteristics of their wider community, they tend to end up in a segregated state. We then investigate the process that causes this and conclude that the result hinges on the similarity of informational states among agents of the same type. This is quite different from Schelling-like behavior and suggests that segregation (...) is an instance of macrobehavior that can arise from a wide variety of micromotives. (shrink)

Review of Ryan Muldoon's book Social Contract Theory for a Diverse World: Beyond Tolerance (in Swedish).

This volume concerns the status and ambitions of metaphysics as a discipline.

The essential guide to the life, thought, and legacy of Adam Smith Adam Smith (1723–90) is perhaps best known as one of the first champions of the free market and is widely regarded as the founding father of capitalism. From his ideas about the promise and pitfalls of globalization to his steadfast belief in the preservation of human dignity, his work is as relevant today as it was in the eighteenth century. Here, Ryan Hanley brings together some of the (...) world's finest scholars from across a variety of disciplines to offer new perspectives on Smith's life, thought, and enduring legacy. Contributors provide succinct and accessible discussions of Smith's landmark works and the historical context in which he wrote them, the core concepts of Smith's social vision, and the lasting impact of Smith's ideas in both academia and the broader world. They reveal other sides of Smith beyond the familiar portrayal of him as the author of the invisible hand, emphasizing his deep interests in such fields as rhetoric, ethics, and jurisprudence. Smith emerges not just as a champion of free markets but also as a thinker whose unique perspective encompasses broader commitments to virtue, justice, equality, and freedom. An essential introduction to Adam Smith's life and work, this incisive and thought-provoking book features contributions from leading figures such as Nicholas Phillipson, Amartya Sen, and John C. Bogle. It demonstrates how Smith's timeless insights speak to contemporary concerns such as growth in the developing world and the future of free trade, and how his influence extends to fields ranging from literature and philosophy to religion and law. (shrink)

Humanitarian intervention is a staple of current discussions about relations among states. Should powerful states interfere in the internal affairs of weaker ones, particularly those identified as failed states, in order to bring peace and stability when it is clear that the existing government can not do so? The concept is an old one, not a new one. European nations that engaged in overseas expansion generally justified their conquests on the grounds that they would seek to civilise and Christianise the (...) peoples whom they encountered. The most extensive discussion of the right ? or the responsibility ? of strong states to intervene on a humanitarian basis occurred among sixteenth- and seventeenth-century Spanish intellectuals who sought to justify the Spanish conquest of the Americas. The most famous of these figures was Francisco de Vitoria (1485?1546) whose De Indis outlined all of the arguments that could be raised for and against such intervention. His line of argument suggests that in the long run, intervention even with the best of intentions, may well lead to tragic consequences. It may even be hubris, the sin of those who would play God. (shrink)

The Metaphysical Club, a gathering of intellectuals in the 1870s associated with Harvard, is widely recognized as the crucible where pragmatism, America's distinctively original philosophy, was refined and proclaimed. Louis Menand's bestseller about the group was a dramatic publishing success. However, only three actual members - Oliver Wendell Holmes Jr., Charles S. Peirce, and William James - appear in this book, alongside other thinkers such as John Dewey who were never in the Club. The Real Metaphysical Club tells the full (...) story of how this influential group shifted the course of philosophy in America. In addition to pioneering pragmatism, the group explored radical empiricism and idealism, and formulated personalism and process philosophy, equally important developments. This volume contains thirty-seven important writings dating from 1870 to 1885 by the real members of the Metaphysical Club. The first section centers on pragmatism and science; the second part collects writings of the lawyers; and the third part covers idealist and personalist philosophers. Many of these writings have never been reprinted before, and nothing like this impressive collection has ever been attempted. A general introduction provides a narrative history, and the editors' three introductions to the volume's sections vividly bring to life the intense meetings, sustained debates, and pioneering thought from the Metaphysical Club. (shrink)

AI and people do not compete on a level-playing field. Self-driving vehicles may be safer than human drivers, but laws often penalize such technology. People may provide superior customer service, but businesses are automating to reduce their taxes. AI may innovate more effectively, but an antiquated legal framework constrains inventive AI. In The Reasonable Robot, Ryan Abbott argues that the law should not discriminate between AI and human behavior and proposes a new legal principle that will ultimately improve human (...) well-being. This work should be read by anyone interested in the rapidly evolving relationship between AI and the law. (shrink)

This paper develops a novel problem for representationalism (also known as "intentionalism"), a popular contemporary account of perception. We argue that representationalism is incompatible with supervaluationism, the leading contemporary account of vagueness. The problem generalizes to naive realism and related views, which are also incompatible with supervaluationism.

Can our beloved cats and dogs love us back? This chapter aims to find a satisfactory theory of love that substantiates the claim that they can. It begins by reconstructing and critically evaluating recent attempts by scientists to show that dogs can love humans back. Although these attempts are argued to be unsuccessful, it is further argued that they illuminate the need for an adequate theory of love and offer us some plausible ideas about love that direct us to two (...) recent philosophical theories of love that support the idea that dogs can love humans back. These two theories are discussed in detail before it is argued that dogs, but not cats, seem capable of loving humans under these theories. These theory-based defenses of the belief that dogs can love humans back are then criticized on the grounds that the theories they use are unsatisfactory because they fail to capture three central truths about love. This leads to a third theory of love that, after some friendly amendments, is argued to be a tentatively adequate theory that provisionally vindicates the claim that dogs, but not cats, can love humans back. (shrink)

The puzzle of petitionary prayer: if we ask for the best thing, God was already going to do it, and if we ask for something that's not the best, God's not going to grant our request. In this paper, we give a new solution to the puzzle.

The focus of this chapter is on some of the ethical and philosophical issues at the intersection of robotics and artificial intelligence (AI) applications in the health care sector and medical assistance in dying (e.g. physician-assisted suicide and euthanasia), including: (1) Is there a role for robotic systems/AI to play in the orchestration or delivery of assisted dying?; (2) Can the use of robotic systems/AI make the orchestration of assisted dying more ethical?; and (3) What insights can be generated in (...) the ethical debate on physician assisted suicide and euthanasia from considering the prospect of robotic systems/AI assisting with the provision of or providing assistance in dying? The prospect of including robotic systems/AI in the context of assisted dying provides opportunity to revisit longstanding philosophical and ethical issues under new light. Indeed, reflecting on these questions may invigorate debate, for example in reconsidering the de-medicalization of assisted dying, reconsidering whether assisted dying is within the proper scope of medicine, and reconsidering which normative approach to the ethics of assisted dying is the most appropriate. (shrink)

For Plato and Aristotle, arete (traditionally translated as "virtue") was the essential object of human admiration and striving, and even the key to happiness. Their work continues to inspire reflection on fundamental questions of ethics and politics today, as the fourteen new essays collected here demonstrate. -/- Contributors: Lidia Palumbo, Eva Anagnostou-Laoutides, Ryan M. Brown, Jay R. Elliott, Guilherme Domingues da Motta, Federico Casella, Jonathan A. Buttaci, George Harvey, Mark Ralkowski, Gary S. Beck, Paula Gottlieb, Giulio di Basilio, Audrey (...) L. Anton, and Elena Bartolini. (shrink)

When thinking of Plato’s discussions of virtue, many dialogues come to mind, but, assuredly, the Phaedrus does not. The word ἀρετή is used only six times in the dialogue. Unlike other dialogues, the Phaedrus thematizes neither the general concept of virtue nor any of the particular virtues. Given the centrality of virtue to Plato’s ethics and politics, it is surprising to see little reference to virtue in a dialogue devoted to love and to rhetoric, topics that have deep ethical and (...) political significance. -/- I argue that the Phaedrus makes important contributions to our understanding of virtue in Plato despite the infrequency of references. First, the dialogue juxtaposes competing conceptions of virtue: the “urbane” (cf. 227d) capacity to make things conform to one’s happenstance desires, championed by Lysias, and the “manic” capacity to conform oneself to reality, championed by Socrates. After clarifying that enslavement to pleasure-lust is the underlying condition of soul for Lysianic virtue, Socrates reveals that the non-lover’s “virtue” is, in truth, virtue in name only. Rather, true virtue emerges only when the soul becomes harmoniously ordered under reason’s guidance, a condition which is achieved through the soul’s encounter with beauty. Second, in the process of articulating how true virtue comes to be in the soul, Socrates gives grounds for distinguishing it from “self-restraint” (ἐγκράτεια), a condition of soul whose outward aspect may be indistinguishable from that of virtue. While a soul in which reason does not take the reins may act from self-restraint, it does not yet act from virtue. Third, the dialogue gives us resources for seeing how other people, such as artful rhetoricians, can influence one’s cultivation of virtue. At first glance, Socrates’s claim that artful rhetoricians can “hand over” virtue (270b) seems incompatible with his claim that virtue is unteachable (cf. Meno 86d-99e). However, the dialogue offers some resources for seeing that the unteachability of virtue and the capacity for rhetoricians to “hand over” virtue are not, in fact, incompatible. From these three points, we will see that the Phaedrus offers an intellectualist account of virtue reminiscent of what we see in other dialogues. The intellectualist vision here, however, is one that includes a positive role for the subrational elements of the soul rather than one that excludes them from relevance or actively seeks to suppress them. (shrink)

In this paper we apply the popular Best System Account of laws to typical eternal worlds – both classical eternal worlds and eternal worlds of the kind posited by popular contemporary cosmological theories. We show that, according to the Best System Account, such worlds will have no laws that meaningfully constrain boundary conditions. It’s generally thought that lawful constraints on boundary conditions are required to avoid skeptical arguments. Thus the lack of such laws given the Best System Account may seem (...) like a severe problem for the view. We show, however, that at eternal worlds, lawful constraints on boundary conditions do little to help fend off skeptical worries. So with respect to handling these skeptical worries, the proponent of the Best System Account is no worse off than their competitors. (shrink)

Coronavirus disease 2019 can lead to respiratory failure. Some patients require extracorporeal membrane oxygenation support. During the current pandemic, health care resources in some cities have been overwhelmed, and doctors have faced complex decisions about resource allocation. We present a case in which a pediatric hospital caring for both children and adults seeks to establish guidelines for the use of extracorporeal membrane oxygenation if there are not enough resources to treat every patient. Experts in critical care, end-of-life care, bioethics, and (...) health policy discuss if age should guide rationing decisions. (shrink)

This book explores the constraints which justice imposes on immigration policy. Like liberal nationalists, Ryan Pevnick argues that citizens have special claims to the institutions of their states. However, the source of these special claims is located in the citizenry's ownership of state institutions rather than in a shared national identity. Citizens contribute to the construction and maintenance of institutions, and as a result they have special claims to these institutions and a limited right to exclude outsiders. Pevnick shows (...) that the resulting view justifies a set of policies - including support for certain types of guest worker programs - which is distinct from those supported by either liberal nationalists or advocates of open borders. His book provides a framework for considering a number of connected topics including issues related to self-determination, the scope of distributive justice and the significance of shared national identity. (shrink)

Nichols offers the first comprehensive interpretation of the eighteenth-century Scottish philosopher Thomas Reid's theory of perception - by far the most important feature of his philosophical system. Nichols's consummate knowledge of Reid's texts, lively examples, and plainspoken style make this book especially readable. It will be the definitive analysis for a long time to come.

These essays strike a judicious yet thought-provoking balance between theoretical and historical perspectives.

When are morally good actions beautiful, when indeed they are? In this paper, it is argued that morally good actions are beautiful when they appear to express the deep or true self, and in turn tend to give rise to an emotion which is characterised by feelings of being moved, unity, inspiration, and meaningfulness, inter alia. In advancing the case for this claim, it is revealed that there are additional sources of well-formedness in play in the context of moral beauty (...) in addition to those that have tended to be focused on to date: one which is connected to imagining a deep location for the goodness concerned, and another which is connected to imagining that the goodness stems from capacities which are essential to the person. (shrink)