From the fall of Rome to the Renaissance almost nothing new was discovered. Man looked back to the great learning of classical civilization for inspiration: admiring their thinkers and architects but incapable of equaling them. In turn, those ancients looked back further, to a previous "Golden Age." Why did civilization fall and then rise again? In 1920, the Indian Yogi Paramhansa Yogananda, author of the spiritual classic "Autobiography of a Yogi",...