Which god are you talking about? If antiquity implies veracity, then I'm trying to understand whether you're talking about Ra, Anubis, Horus, Neith, Isis, etc., or someone predating them.
Well there is only one. Of course, man has been creating his own gods for all his history.
Atheists aren't any different. It's just a matter of semantics. They have their own creation myths -- the universe existed unchanged forever, or there is a infinite multitude of universes so random chance can explain our existance or whatever.
They have their own messiahs and saints from whence they get their values. For awhile Marx sufficed for some and Freud for others. Both are now pretty much on history's ash heap.
Regardless, you missed the point. Atheists aren't anything new, although most probably think they are.
God, with a BIG G: creator God. The Triune God.