Here is a blog page that you will be interested in reading. It is David Murray summarizing an article in The Atlantic. i am tempted to cut and paste it below, but don't know if that is proper, so I'll just give you the link and you can see it for yourself:
http://headhearthand.org/blog/2014/10/28/what-led-you-to-become-an-atheist-some-surprising-answers
