In trying to understand moral behavior, researchers historically adopted a cognitive-rationalistic approach that emphasized reasoning and reflection. However, a new generation of investigators has become intrigued by the role of emotional, unconscious, and intra- and interpersonal processes. The contributors to this volume begin by presenting basic issues and controversies in the study of morality; subsequent chapters explore the psychological processes involved, such as the cognitive mechanisms and motives underlying immoral behavior and moral hypocrisy. Later chapters discuss personality, developmental, and clinical aspects of morality as well as societal aspects of good and evil, including the implications of moral thinking for large-scale violence and genocide. The wide-ranging findings and discussions presented in this volume make this work a provocative and engaging resource for social psychologists and other scholars concerned with moral judgments and both moral and immoral behavior.