The Trolley Problem is one of the most intensively discussed and controversial puzzles in contemporary moral philosophy. Over the last half-century, it has also become something of a cultural phenomenon, having been the subject of scientific experiments, online polls, television programs, computer games, and several popular books. This volume offers newly written chapters on a range of topics including the formulation of the Trolley Problem and its standard variations; the evaluation of different forms of moral theory; the neuroscience and social psychology of moral behavior; and the application of thought experiments to moral dilemmas in real life. The chapters are written by leading experts on moral theory, applied philosophy, neuroscience, and social psychology, and include several authors who have set the terms of the ongoing debates. The volume will be valuable for students and scholars working on any aspect of the Trolley Problem and its intellectual significance.

For centuries, the sorites paradox has spurred philosophers to think and argue about the problem of vagueness. This volume offers a guide to the paradox which is both an accessible survey and an exposition of the state of the art, with a chapter-by-chapter presentation of all of the main solutions to the paradox and of all its main areas of influence. Each chapter offers a gentle introduction to its topic, gradually building up to a final discussion of some open problems. Students will find a comprehensive guide to the fundamentals of the paradox, together with lucid explanations of the challenges it continues to raise. Researchers will find exciting new ideas and debates on the paradox.

Frank Jackson's knowledge argument imagines a super-smart scientist, Mary, forced to investigate the mysteries of human colour vision using only black and white resources. Can she work out what it is like to see red from brain-science and physics alone? The argument says no: Mary will only really learn what red looks like when she actually sees it. Something is therefore missing from the science of the mind, and from the 'physicalist' picture of the world based on science. This powerful and controversial argument remains as pivotal as when it was first created in 1982, and this volume provides a thorough and incisive examination of its relevance in philosophy of mind today. The cutting-edge essays featured here break new ground in the debate, and also comprehensively set out the developments in the story of the knowledge argument so far, tracing its impact, past, present, and future.

At the turn of the twentieth century, G. E. Moore contemptuously dismissed most previous 'ethical systems' for committing the 'Naturalistic Fallacy'. This fallacy - which has been variously understood, but has almost always been seen as something to avoid - was perhaps the greatest structuring force on subsequent ethical theorising. To a large extent, to understand the Fallacy is to understand contemporary ethics. This volume aims to provide that understanding. Its thematic chapters - written by a range of distinguished contributors - introduce the history, text and philosophy behind Moore's charge of fallacy and its supporting 'open question' argument. They detail how the fallacy influenced multiple traditions in ethics (including evolutionary, religious and naturalistic approaches), its connections to supposed dichotomies between 'is'/'ought' and facts/values, and its continuing relevance to our understanding of normativity. Together, the chapters provide a historical and opinionated introduction to contemporary ethics that will be essential for students, teachers and researchers.

When philosophers try to understand the nature of knowledge, they have to confront the Gettier problem. This problem, set out in Edmund Gettier's famous paper of 1963, has yet to be solved, and has challenged our best attempts to define what knowledge is. This volume offers an organised sequence of accessible and distinctive chapters explaining the history of debate surrounding Gettier's challenge, and where that debate should take us next. The chapters describe and evaluate a wide range of ideas about knowledge that have been sparked by philosophical engagements with the Gettier problem, including such phenomena as fallibility, reasoning, evidence, reliability, truth-tracking, context, luck, intellectual virtue, wisdom, conceptual analysis, intuition, experimental philosophy, and explication. The result is an authoritative survey of fifty-plus years of epistemological research - along with provocative ideas for future research – into the nature of knowledge.

Ontological arguments are one of the main classes of arguments for the existence of God, and have been influential from the Middle Ages right up until the present time. This accessible volume offers a comprehensive survey and assessment of them, starting with a sequence of chapters charting their history - from Anselm and Aquinas, via Descartes, Leibniz, Kant and Hegel, to Gödel, Plantinga, Lewis and Tichý. This is followed by chapters on the most important topics to have emerged in the discussion of ontological arguments: the relationship between conceivability and possibility, the charge that ontological arguments beg the question, and the nature of existence. The volume as a whole shows clearly how these arguments emerged and developed, how we should think about them, and why they remain important today.

Newcomb's problem is a controversial paradox of decision theory. It is easily explained and easily understood, and there is a strong chance that most of us have actually faced it in some form or other. And yet it has proven as thorny and intractable a puzzle as much older and better-known philosophical problems of consciousness, scepticism and fatalism. It brings into very sharp and focused disagreement several long-standing philosophical theories on practical rationality, on the nature of free will, and on the direction and analysis of causation. This volume introduces readers to the nature of Newcomb's problem, and ten chapters by leading scholars present the most recent debates around the problem and analyse its ramifications for decision theory, metaphysics, philosophical psychology and political science. Their chapters highlight the status of Newcomb's problem as a live and continuing issue in modern philosophy.

In his famous Wager, Blaise Pascal (1623–62) offers the reader an argument that it is rational to strive to believe in God. Philosophical debates about this classic argument have continued until our own times. This volume provides a comprehensive examination of Pascal's Wager, including its theological framework, its place in the history of philosophy, and its importance to contemporary decision theory. The volume starts with a valuable primer on infinity and decision theory for students and non-specialists. A sequence of chapters then examines topics including the Wager's underlying theology, its influence on later philosophical figures, and contemporary analyses of the Wager including Alan Hájek's challenge to its validity, the many gods objection, and the ethics of belief. The final five chapters explore various ways in which the Wager has inspired contemporary decision theory, including questions related to infinite utility, imprecise probabilities, and infinitesimals.

The scenario of the brain in a vat, first aired thirty-five years ago in Hilary Putnam's classic paper, has been deeply influential in philosophy of mind and language, epistemology, and metaphysics. This collection of new essays examines the scenario and its philosophical ramifications and applications, as well as the challenges which it has faced. The essays review historical applications of the brain-in-a-vat scenario and consider its impact on contemporary debates. They explore a diverse range of philosophical issues, from intentionality, external-world scepticism, and the nature of truth, to the extended mind hypothesis, reference magnetism, and new versions of realism. The volume will be a rich and valuable resource for advanced students in metaphysics, epistemology, and philosophy of mind and language, as well as anyone interested in the relations between language, thought and the world.

At the centre of John Rawls's political philosophy is one of the most influential thought experiments of the twentieth century: which principles of justice would a group of individuals choose to regulate their society if they were deprived of any information about themselves that might bias their choice? In this collection of new essays, leading political philosophers examine the ramifications and continued relevance of Rawls's idea. Their chapters explore topics including the place of the original position in rational choice theory, the similarities between Rawls's original position and Kant's categorical imperative, the differences between Rawls's model and Scanlon's contractualism, and the role of the original position in the argument between Rawls and other views in political philosophy, including utilitarianism, feminism, and radicalism. This accessible volume will be a valuable resource for undergraduates, as well as advanced students and scholars of philosophy, game theory, economics, and the social and political sciences.

The Prisoner's Dilemma is one of the most fiercely debated thought experiments in philosophy and the social sciences, presenting the simple insight that when two or more agents interact, the actions that most benefit each individual may not benefit the group. The fact that when you do what is best for you, and I do what is best for me, we end up in a situation that is worse for both of us makes the Prisoner's Dilemma relevant to a broad range of everyday phenomena. This volume of new essays from leading philosophers, game theorists, and economists examines the ramifications of the Prisoner's Dilemma, the directions in which it continues to lead us, and its links to a variety of topics in philosophy, political science, social science, economics, and evolutionary biology. The volume will be a vital and accessible resource for upper-level students as well as for academic researchers.