Atheism
From dKosopedia
Atheism is the belief that there is no God, no soul, no supernatural cosmic structure of morality, and no afterlife. Rhetorically, atheism is the position that arguments should not be made from religious authority, religious people that believe in the separation of church and state, for example, support secular reasoning in law. Despite the fact that a few million Americans belong to no organized religion, Atheist is still one of the most powerful slurs in American politics.
Atheists are of two different kinds, "strong" atheists are sure in their own minds that God does not exist. "Weak" atheists are unsure and are similar to weak agnostics.

