In recent decades normative reasons-considerations that count in favor of one thing or another-have come to the theoretical fore in ethics and epistemology. A major attraction of normative reasons is that they have weight or strength. Reasons are particular considerations that count in favor of actions or attitudes to some degree. This feature is attractive to theorists who want to explain more complex normative phenomena in terms of a notion that is weighted. This volume aims to provide the beginnings for a theory of weight. The fourteen new essays fall into three groups. One set of essays addresses questions about the nature of weight. Topics include the relations between reasons and conditions and modifiers, between reasons and other weighted notions such as commitments, and different models of the interaction of reasons. A second set of essays addresses substantive questions: questions about weight relevant to value-first, desire-first, evidence-first and other normative research programs. A third set of essays applies issues in the theory of weight to broader ethical debates. The book thus not only makes novel contributions to debates in ethics and epistemology about the nature of normative reasons and their weight, it also makes a strong case for the theoretical fruitfulness of the ideology of normative reasons.

The Importance of Being Rational systematically defends a novel reasons-based account of rationality. The book's central thesis is that what it is for one to be rational is to correctly respond to the normative reasons one possesses. Errol Lord defends novel views about what it is to possess reasons and what it is to correctly respond to reasons. He shows that these views not only help to support the book's main thesis, they also help to resolve several important problems that are independent of rationality. The account of possession provides novel contributions to debates about what determines what we ought to do, and the account of correctly responding to reasons provides novel contributions to debates about causal theories of reacting for reasons. After defending views about possession and correctly responding, Lord shows that the account of rationality can solve two difficult problems about rationality. The first is the New Evil Demon problem. The book argues that the account has the resources to show that internal duplicates necessarily have the same rational status. The second problem concerns the deontic significance of rationality. Recently it has been doubted whether we ought to be rational. The ultimate conclusion of the book is that the requirements of rationality are the requirements that we ultimately ought to comply with. If this is right, then rationality is of fundamental importance to our deliberative lives.

The Importance of Being Rational systematically defends a novel reasons-based account of rationality. The book's central thesis is that what it is for one to be rational is to correctly respond to the normative reasons one possesses. Errol Lord defends novel views about what it is to possess reasons and what it is to correctly respond to reasons. He shows that these views not only help to support the book's main thesis, they also help to resolve several important problems that are independent of rationality. The account of possession provides novel contributions to debates about what determines what we ought to do, and the account of correctly responding to reasons provides novel contributions to debates about causal theories of reacting for reasons. After defending views about possession and correctly responding, Lord shows that the account of rationality can solve two difficult problems about rationality. The first is the New Evil Demon problem. The book argues that the account has the resources to show that internal duplicates necessarily have the same rational status. The second problem concerns the deontic significance of rationality. Recently it has been doubted whether we ought to be rational. The ultimate conclusion of the book is that the requirements of rationality are the requirements that we ultimately ought to comply with. If this is right, then rationality is of fundamental importance to our deliberative lives.