More than 4,000 religions exist today. But no matter how different some may seem, all are centered around 16 psychological needs deeply rooted in human nature. Whether you're religious or not, everyone has a spiritual personality. A new book, "The 16 Strivings for God: The New Psychology of Religious Experiences" explores those needs and the psychology behind them.

Guests:

Steven Reiss, Psychologist and Author of "The 16 Strivings for God: The New Psychology of Religious Experiences"