A novel evolutionary theory of psychiatry proposing that five modern anxiety and depressive disorders evolved from ancient instincts for herd harmony and survival. The anxiety and depressive symptoms we feel today are actually prompting us towards primevally altruistic behaviors, even though they today cause us pain and limit our individual societal successes. Written in non-technical language for a broad audience, with more than 600 supporting references, as well as cartoons, jokes, song lyrics and literary references.
