Atheism is about the individual, religion is about building a society and a community.
Religion is about some individuals gaining power in the religious hierarchy, taking tithes off the masses, becoming wealthy, and generally not doing any hard work. Religion is about individuals feeling pious and better than other people, it appeals to their ego. Religion gives people forgiveness when they sin, and boy, do the religious sin just as much as anybody.
The reason for morals and ethics has no place in atheism except as a function of living in society. Hence the responses in this thread.
Atheism does not discuss morals, because atheism is a very simple idea; simply a lack of belief in god, no more. Societies create religions, which is why religions are concentrated in geographic regions. To imply that religion helps build societies is rather putting the cart before the horse.
Anyway SAM these flaccid stabs at atheism are getting rathe tiresome. After all your time here, I'd have thought the simple definition of atheism would have dawned on you by now, but seemingly not.