i dont think so since it is not organized. it emphasizes the individual to a point that each person as his or her own religion. so atheism cannot be summed up in a paragraph like most religions. its a set of beliefs, an attempt to answer the big questions. so atheism does not provide that. though, it is understandable why fellow christians would call it one. in their experiences and mine, atheists treat atheism as if it were religion. for example, answering origin, meaning that we have no meaning, the truth that there is no truth, believing in chance, creating famous atheists, writing about atheism, writing handbooks on how to defend atheism. the fact is it is not, but it is treated and also seen that it is.