Whether one believes or not religion is as real a force in the life of the world as economics or politics and it demands fair-minded attention. Even if you think the entire religious enterprise is at best misguided and at worst counterproductive it remains vital inspiring great good and sometimes great evil.
I'd love to go back to Europe in the '20s and '30s for the beginning of the Psychoanalytic Movement and Freud and Jung and all that was going on with discoveries in quantum physics. The whole nature of reality was changing and being challenged.