A self-help book that uses the principles of Transactional Analysis to guide a person toward an understanding of his behavior and to help him in attaining more rational behavior.

Interdisciplinary approach to the investigation of how the human brain is sculpted by evolution, constrained or freed by genes, shaped by early experience, modulated by hormones, and otherwise influenced to produce a wide range of behaviors, some of them abnormal. Explains how little can be explained by thinking about any one of these factors alone because some combination of influences is almost always at work.