It was only when the Europeans came in that all of that started to happen. No, well before the Europeans came in, North and South America had been settled. Agriculture developed at a similar time scale. Significant complex civilizations, writing developed on a similar time scale. But once you have the European colonization, some people say it was intentional. It was probably a combination of intentional and just diseases that were unfamiliar to the people here. Within 150 years, that 50 to 100 million population, so now we're talking about roughly by 1650, so you move a little bit future forward in time, the population had gone to roughly six million people.