Illustrating the diversity and richness of biosocial theory, this contributor volume introduces numerous new views on the biological and social causes of criminality and pro/antisociality. From the biosocial perspective, criminal behavior becomes part of a behavioral continuum which may theoretically include basic moral reasoning and altruism. Contributors from diverse fields outline basic assumptions of the biosocial perspective. They examine various evolutionary, genetic, and neurochemical aspects of criminality; and push the limits of current knowledge to the outer edges of biosocial theorizing. This volume is intended to inform social scientists, particularly criminologists, of recent developments in biosocial approaches to the study of pro/antisociality and criminality. It is the intent of the editors to give readers of this book a clear picture of the biosocial approach to the study of pro/antisociality. Emphasizing the interdisciplinary nature of this field, contributors were selected from diverse academic backgrounds. The volume contains seventeen chapters and is organized in four sections. The first section conceptualizes the field, identifies behavioral and demographic variables correlated with criminality, and discusses the degree to which experts currently subscribe to the biosocial perspective. Section Two examines the contribution of evolutionary and genetic factors to variations in criminality. Section Three focuses on how brain functioning relates to pro/antisociality. The final section extends the theoretical limits of existing knowledge, illustrating the potential of this approach to social science.