Sure. But why do you think changing human nurture is any easier than changing human nature? I suspect that as your set of humans in consideration tends to include the set of all humans, the gap between changeability of human nature vs changeability of human nurture reduces to zero.
Perhaps you are implying that we sign up for a global (truly global, not global by the standards of Western journalists) campaign of complete and irrevocable reform in our behavior, beliefs and knowledge. At the very least, this implies simply killing off a huge number of human beings who for whatever reason stand in the way. This is not (just) a hypothesis -- some versions of this have been tried and tested. *