Kill Hunger, then slowly beat War to death with the butt of the gun for being a dick who deserves a longer, slower more painful death.
Alternatively, Shoot War, and feed the corpse to Hunger.
The option of shooting myself is attractive, purely because I'd enjoy the irony of a fat guy like myself solving world hunger by eating a bullet.
Also, on my favourite subject, it'd be fun to see how the newspapers manage to make a fat guy look bad for saving the world, because, we all know only slender, beautiful people do anything good any more.