This book proposes to examine the nature of religion by seeking its origin within the context of the theory of evolution and the development of the human brain. It is argued that religion is the way the mechanism of natural selection in the theory of evolution operates to help humans survive in the context of a dangerous and hostile world. Survival is accomplished when profound experiences like trance cause a rewiring of the brain, giving birth to what later is identified as religious attitudes and ways of behaving. It is possible to speculate that without the development of religion, humans might not have survived to create cultures and civilizations. Therefore, the development of religion makes it possible for early humans to thrive. This evolutionary process involved adaptation to one's environment, creation of social groups, and development of the body and the brain.

With a review of the so-called Big Bang theory about the beginning of the universe, Darwin's theory of evolution, the quest for the birth of religion, and the cognitive contribution to this quest, the initial chapter commences a major theme of this book, namely the importance of origins. For our human ancestors, religion was not a way to get rich or to distinguish oneself from others, it was a means of survival. This was a perfectly natural development and response to one's hostile environment.