Book excerpt: This compelling work brings together an array of distinguished scholars to explore key concepts, theories, and findings pertaining to some of the most fundamental issues in social life: the conditions under which people are kind and helpful to others or, conversely, under which they commit harmful, even murderous, acts. Covered are such topics as the complex interaction of individual, societal, and situational factors underpinning good or evil behavior; the role of guilt and the self-concept; and issues of responsibility and motivation, including why good people do bad things. The volume also examines whether aggression and violence are inescapable aspects of human nature, and how cooperative interaction can break down stereotyping and discrimination.