Alvin Toffler Man has a limited biological capacity for change. When this capacity is overwhelmed, it is in 'future shock'. Many that live deserve death. And some that die deserve life. Then do not be too eager to deal out death in judgement.
Eternity is just time on an ego trip.
The major virtues tend to disintegrate under the pressures of convenient rationalization. They're about who's going to be top dog. It doesn't matter what it is, somebody will find a way to make a profit off of it. The universe is a big place, perhaps the biggest. In answer to the question of why it happened, I offer the modest proposal that our Universe is simply one of those things which happen from time to time.