Sam stares moodily into space. "Had previously pissed off Dad, so when I stopped the siblings from breaking into Eden and quite possibly starting an interesting but vicious Apocalypse, there wasn't anyone to stop me from being killed by extremely annoyed siblings. And when they tried I ran like hell. To Hell, actually. Set myself up as ruler and bullied the place into some kind of stability, then put the best demon-ruler I could find in charge of the place, guided by an ally of mine. Then went to Earth for better food, weather and entertainment. Spent as much time there as I could, interspersed with occasionally having people try to kill me. And generally making a nuisance of myself when necessary, in an attempt to keep aforementioned siblings destroying large numbers of the human race."