Although the study of reasons plays an important role in both epistemology and moral philosophy, little attention has been devoted to the question of how, exactly, reasons interact to support the actions or conclusions they do. In this book, John F. Horty attempts to answer this question by providing a precise, concrete account of reasons and their interaction, based on the logic of default reasoning. The book begins with an intuitive, accessible introduction to default logic itself, and then argues that this logic can be adapted to serve as a foundation for a concrete theory of reasons. Horty then shows that the resulting theory helps to explain how the interplay among reasons can determine what we ought to do by developing two different deontic logics, capturing two different intuitions about moral conflicts. In the central part of the book, Horty elaborates the basic theory to account for reasoning about the strength of our own reasons, and also about the related concepts of undercutting defeaters and exclusionary reasons. The theory is illustrated with an application to particularist arguments concerning the role of principles in moral theory. The book concludes by introducing a pair of issues new to the philosophical literature: the problem of determining the epistemic status of conclusions supported by separate but conflicting reasons, and the problem of drawing conclusions from sets of reasons that can vary arbitrarily in strength, or importance.

In this volume, John Horty brings to bear his work in logic to present a framework that allows for answers to key questions about reasons and reasoning, namely: What are reasons, and how do they support actions or conclusions?

Virtue ethics in its contemporary manifestation is dominated by neo Aristotelian virtue ethics primarily developed by Rosalind Hursthouse. This version of eudaimonistic virtue ethics was ground breaking, but has been subject to considerable critical attention. Christine Swanton shows that the time is ripe for new developments and alternatives. The target centred virtue ethics proposed by Swanton is opposed to orthodox virtue ethics in two major ways. First, it rejects the 'natural goodness' metaphysics of Neo Aristotelian virtue ethics owed to Philippa Foot in favour of a 'hermeneutic ontology' of ethics inspired by the Continental tradition and McDowell. Second, it rejects the well -known 'qualified agent' account of right action made famous by Hursthouse in favour of a target centred framework for assessing rightness of acts. Swanton develops the target centred view with discussions of Dancy's particularism, default reasons and thick concepts, codifiability, and its relation to the Doctrine of the mean. Target Centred Virtue Ethics retains the pluralism of Virtue Ethics: A Pluralistic View (2003) but develops it further in relation to a pluralistic account of practical reason. This study develops other substantive positions including the view that target centred virtue ethics is developmental, suitably embedded in an environmental ethics of "dwelling"; and incorporates a concept of differentiated virtue to allow for roles, narrativity, cultural and historical location, and stage of life.

Increasingly it is being recognized that consumer behavior may be a key trigger in the march toward sustainable development. Several lines of psychological theory and approaches have been developed relatively independently, each of which may provide major implications and action points on how consumers might be moved toward more sustainable behavior. This book is the first that brings together this variety of perspectives and theoretical angles around the common ambition of sustainable development. The contributors are all leading social scientists in the field of consumer behavior who met the challenge to sketch out their theoretical perspectives, but also to go beyond their normal theorizing and think out of the box in order to show how these theoretical perspectives might be made actionable in terms of key managerial and policy perspectives toward sustainable development. The result is a book that shows a wealth of information and approaches the question of how to encourage sustainable behavior from a myriad of divergent perspectives. This should stimulate scientists and policy-makers alike to find similarities, differences, and synergies between state-of-the-art psychological thinking about how to most effectively stimulate sustainable consumer behavior.