Apostates are people who formally renounce their religion and join another.
Another term for the New Stone Age is the Neolithic Age.
Often the word atheist is used to describe someone who rejects God or gods. The dictionary didn't have a term for religion-less, however, that term could be used.
missionaries
It means that you accept the core beliefs of the new religion, and that you become a member of their community.
Colonisation.
The Antichrist is a term used in the New Testament of the Bible to refer to the devil.
religion
αρνησιθρησκεία (to refuse your believes in religion, to refuse to be a man who believes that God exists.)
The term, scientific religion, is an oxymoron. There is no such thing.
Non-theistic is the term used for any religion that does not believe in a god.
The term used for creating a new species is called speciation. Evolution is involved over the long run. Another term that is often thrown about is natural selection but that is just another way of saying evolution.