Drawing on a wide range of studies to cross-match faith – measured by belief in God and acceptance of evolution – with homicide and sexual behavior, Paul found that secular societies have lower rates of violence and teenage pregnancy than societies where many people profess belief in God.

Top of the class, in both atheism and good behavior, come the Japanese. Over eighty percent accept evolution and fewer than ten percent are certain that God exists. Despite its size – over a hundred million people – Japan is one of the least crime-prone countries in the world. It also has the lowest rates of teenage pregnancy of any developed nation. (source)