It's so easy to play God hovering in the skies, and make decisions for these people's future, isn't it? Maybe they actually don't enjoy 50+% child mortality, dying of appendicitis, and having to barter a truckload of plantains for a pot and a steel machete. Why don't they send someone on the ground, to explain to them that there's a big world out there that can change their ways forever, and give them a choice whether they'd like to be a part of it or not?