... Rowan the Resonant.
... and The Nonbelievers. (Hat tip, Rus Bowden.)
Of course, the real test is staying power. Religion has definitely demonstrated - and continues to demonstrate - that it has what it takes when it comes to longevity. Of course, atheism has been around a long time, too. ("The fool saith in his heart, 'There is no God.' ") I think it will continue, but as a distinctly minority viewpoint, one of its main problems being a disinclination on the part of its adherents to breed (not very Darwinian of them, I must say).