On the sim theory, my favorite idea behind that is that this is just one giant social MMO. That each of us is this immortal alien. You go in the MMO because you're immortal and have everything catered to you. So you need to remember what suffering was like otherwise the while society collapses. It's not really for fun, it's just to remember when life was hard. Because otherwise you'd end up like a decadent civilization which basically destroys itself through ennui. So we're in this horrible MMO so we gain perspective and our society doesn't fall to insane cruelty.