OK I have watched about half of so far and don't think I can stand to watch the other half. I would rather look at footage of space aliens or bigfoot. 500 million people on earth. It would be very lonely by todays standard. The population density would be like North Dakota. Fishing would be better though and probably no wars because we would ALL be working for the MAN. As long as I am one of the 500 million sounds good to me. Maybe I could be in charge of cutting off fish heads to feed to the other 499,999,999 along with their bowl of rice.