Religion concerns itself with "supernatural" issues. Evolution (there is no such thing as "Darwinianism" - idiots) only concerns itself with "materialism" (the main complaint against it) so it cannot be a "religion." You guys need to study the English language more and learn the meaning of words. As it is, you don't understand what you are talking about.
Actually the better definition [See Religious Tolerance.Org ] is as follows:
"Religion is any specific system of belief about deity, often involving rituals, a code of ethics, a philosophy of life, and a worldview." (A worldview is a set of basic, foundational beliefs concerning deity, humanity and the rest of the universe.) Thus we would consider Christianity, Islam, Judaism, Native American Spirituality, and Neopaganism to be religions. We also include Agnosticism, Atheism, Humanism, Ethical Culture, Darwininan Originism etc. as religions, because they also contain a "belief about deity" -- their belief is that they do not know whether a deity exists, or they have no knowledge of God, or they sincerely believe that God does not exist. "