I did not explain myself correctly, then. What I meant was that I did not want a carbon copy setting, but an amalgamation of ideas from multiple source. For example, Pericle:
"Pericle will be the exact copy of Gondor." (Gondor is a great idea, it's directly copying it which I don't like)
versus
"OK, Pericle will be like Medieval Italy, but blue, with elements of the Roman Republic in one city, has tall buildings, and I'll my own ideas to it."
The first one is a carbon copy (which I don't like), while the second one is acceptable.