Again, I'm not refuting your claim, merely saying that doesn't preclude, or deny the claim you're responding to. History, while complex, and civilizations more points on a spectrum, than a closed system, doesn't prevent or deny the claim of a civilization claiming a unique, distinct, and separate identity that is used to claim the products of a society.

Nothing is original. If that's you're claim then it's not a valid argument, and doesn't really address the situation other introduce some existentially reductive platitudes.