Absolutely not. Darwinism is a secular model - it does not make any statements for or against any deity. Many christians and other theist have seen ways to reconcile acceptance of such scientific models with their theistic beliefs.
"John is an atheist, which means he does not believe in the existence of any gods or deities."
No, the Progressive reformers did not believe in Social Darwinism. They believed that its competition and conflict were both detrimental to their society.
Is considered an atheist by the mainstream.
It means you are an atheist. An atheist is someone who does not believe in devils or gods.
No, if you are an atheist, you don't believe in god.
That's pretty much the definition of "Atheist" so yes, an atheist is someone who doesn't believe in god or gods.
No. Pagans believe in various gods. An atheist does not believe in any god or gods.
Such a person is called an ATHEIST.
A man who doesn't believe in god is commonly referred to as an atheist.
Ok, atheist do not believe in god or jesus therefore cannot possibly celebrate something we do not believe in.
Nobody. An Atheist doesn't believe that there is any type of god out there.
An atheist.