Bertrand Russell is often considered one of the greatest thinkers of all time and having been impressed by his teapot argument i thought i would try reading one of his books. So i bought 'why i am not a christian' So far it is really good, most of the arguments are ones i already know (such as who made god) but this one was new to me:
Christ tells us to become as little children, but little children cannot understand the differential calculus, or the principles of currency, or the modern methods of combating disease. To acquire such knowledge is no part of our duty, according to the church.
This bit is online here (although id recomed buying the book):
His most famous essay can be found here
This guy is an even bigger genius than I was expecting