Id want the world to have physics go insane, and the ability to use electricity on earth becomes impossible unless you are given the ability to with a device, and earth is forced into the 1700's again except theres ammo for modern guns but its scarce due to the worldwide anarchy that ensues after the blackout. Then humanity wiuld be back to healthy days when there was no pollution, and hmanity would be anle to regain its values. Also noone would die from a stupid asteroid, and we would all learn to live in reality. Someones gonna call me a sociopath for thinking this, i know it.