Alceste
Vagabond
God's existence has absolutely nothing to do with whether even one person believes in Him or not.
If nobody believed in any gods, we'd have a society of people who believed there were no gods. People who believe there are no gods are, by definition, atheists. There do not need to be theists in order for God to exist, if He does. If He doesn't exist, He simply doesn't exist. Can't give the atheists credit for making it happen.
But in the mind of an atheist, gods simply don't exist. The existence or non-existence of gods is never pondered at all. If everybody thought that way, the whole issue of gods would be exactly as irrelevant as the issue of the moon being made of cheese. Would there be a word for it? IMO, probably not. "Atheist" isn't something most of us generally define ourselves as, it's something theists define us as. If there were no theists, there would be nobody around to slap a label on people who don't believe in gods.