I agree with you. I don't think the planet can sustain more than about 4B people. As the third world countries get better health care and have better infant mor

I agree with you. I don't think the planet can sustain more than about 4B people. As the third world countries get better health care and have better infant mortality, their rates will continue to drop. Additionally, robotics are going to continue to reduce our need for people to do stuff for other people.