[autodidacticon]

The Origin of Consciousness in the Breakdown of the Bicameral Mind - Julian Jaynes

Ancient human's may have more in common with schizophrenics of today than history would indicate. Religion may be a result thereof.

A People's History of the United States - Howard Zinn

US History can be considered a function of large scale popular movements rather than decisions made by individuals (leaders).

Gun's Germs & Steel - Jared Diamond

Civilizations' success can be considered a function of base resources (edible grains, farmland, metals).