Yours is a common misconception, but atheism is absolutely a belief system.
"I don't believe in god" is not the same as "I believe god doesn't exist".
The latter statement is of atheists. As an agnostic, I think agnosticism is the only actual "lack" of a belief system, since I don't hold a belief either way (for/against god's existence).
"I don't believe in god" is not the same as "I believe god doesn't exist".
The latter statement is of atheists. As an agnostic, I think agnosticism is the only actual "lack" of a belief system, since I don't hold a belief either way (for/against god's existence).