Based on data collected by the Altruistic Personality and Prosocial Behavior Institute, and using both quantitative and qualitative analyses, the book examines the cultural contexts in which the very religious, irreligious and moderately religious, as well as Protestants and Catholics, made their decisions to rescue or not to rescue. Although focusing on a particular historical event, a major purpose of the book is to suggest implications for enhancing the possibilities of our group altruism among diverse cultures.