(Forgive me of there’s already a proper pasta for this)
You have been given the ability to alter the human race as you see fit. Whether it is human biology, the biology of the sexes, cultural norms/customs, or other races living on the planet (sentient or not), you have the ability to change it all but with one simple rule:
You are not exempt from these effects.
How do you make the planet your dream-cum-true?