This volume brings together a group of essays by leading philosophers of science, ethicists, and legal scholars, commissioned for an important and controversial conference on genetics and crime. The essays address basic conceptual, methodological, and ethical issues raised by genetic research on criminal behavior but largely ignored in the public debate. They explore the complexities in tracing any genetic influence on criminal, violent, or antisocial behavior, the varieties of interpretation to which evidence of such influences is subject, and the relevance of such influences to the moral and legal appraisal of criminal conduct. The volume provides a critical overview of the assumptions, methods, and findings of recent behavioral genetics.