Book excerpt: "In The Good Book of Human Nature, evolutionary anthropologist Carel van Schaik and historian Kai Michel advance a new view of Homo sapiens' cultural evolution. The Bible, they argue, was written to make sense of the single greatest change in history: the transition from egalitarian hunter-gatherer to agricultural societies. Religion arose as a strategy to cope with the unprecedented levels of epidemic disease, violence, inequality, and injustice that confronted us when we abandoned the bush--and which still confront us today, "--Amazon.com.