Since atheists have a common belief system and they are pretty organized why they do not consider themselves as a part of a another religion which does not have a god?
while that is true, there is another element lacking why atheism cannot be considered as another form of religion. Religion is not only about belief system and organization, it should be humanity linked to a supernatural or spiritual elements. If this is lacking then we can consider your above statement as definitive of a social movement.You underestimate nature. Try growing an arm after losing one. Try to scientifically create life in the lab from scratch. People have made a few simple robots that can "reproduce" sort of, but nothing like nature. In fact, the complexity of life is so great, that many scientists now wonder if it is even possible to have come about on earth, to say nothing about some other planet somewhere in the universe.
The point? So far, even with all our great scientific achievements, life is entirely a supernatural thing. We can't make it happen without it having been there first. Maybe all of nature is supernatural.
The greater point? If people do it, they do it by religion. Since we have such a seeming supernatural universe, atheists are the ones who are supernatural, because God is not. God is the real natural.
