keyplus, as on so many other occasions you miss the point of my comment on the actual question.
Since neither you nor 123 everton do not expect my rejection of all those other superstitions I listed to have 'done something for the world' why should my equally routine rejection of God have done so?
Atheism is not a cult, a philosophy, an instruction as to how people should run their lives, a political viewpoint or any other mindset that could be expected to 'do something for the world'. It is a simple, routine, everyday, commonsense, matter-of-fact, rational, logical rejection of an absurd idea.
Having done that rejection, theists can then put their minds to more important things, some of which might do something for the world. Surely freeing at least some minds from the tyranny of oppressive superstition is a good start.