We posit a hypothetical alternate universe U where only mutants do monstrous things.
We observe that mutants are rare in our world, and we speculate that the causes of mutant rarity would not be different in U, and therefore we conclude that “mutants would be rare” in U, and therefore we conclude that “the history of the human species would look very different” in U… specifically, that fewer monstrous things would have happened.
We posit a hypothetical alternate universe U where only mutants do monstrous things.
We observe that mutants are rare in our world, and we speculate that the causes of mutant rarity would not be different in U, and therefore we conclude that “mutants would be rare” in U, and therefore we conclude that “the history of the human species would look very different” in U… specifically, that fewer monstrous things would have happened.