Eat Your Fill

We arrive at the End of Days - the bombs have gone off, nuclear winter is about to set in - almost all life is expected to die. Only one man looks at all this and sees tremendous opportunity. He is a cannibal. To HIM, this disaster means he can indulge in his greatest love - eating human flesh.
But there is a problem - To KEEP doing this, there needs to be some humans left to eat, and so he is grudgingly forced to get past his anti-social disposition and save the world. And what better way to do this than his own brand of alcoholic hedonism, which he re-brands to become a religion!
All he has to do now is remove the old guard, create elections, then get himself elected President. After this, kill the Zombies, take over the military, and - oh yeah - conquer Mexico. Then maybe figure out why the Aliens are here. Shouldn't take long.