"'A species continues to exist by outbreeding the checks that its natural enemies impose on it. That is what gives the illusion of "the balance of nature" belief. Once the natural enemies cease to be a threat its fecundity becomes terrifying. Look what has happened in a generation or two to our own population, largely because a few diseases have been overcome. Find a way of conquering the natural enemies, and the only limiting factor is the food supply.'"