"Trust me. If they saw my world, the goody-goodys would be all over changing it."

Actually, the more he thought about it though, the less likely he'd be to do anything even if he had the tech. Simply put, if the world never turned to shit, Ellie would never have been born. Her parents met and conceived her... what? Five years into everything? Chances of them doing the exact same thing if the world were still alright were slim to none.

So. Unless he could somehow protect her from the effects of re-writing time, the world would just have to Deal.