The world population at that time was about 500 million people. And given that the Americas is about 1 3rd of the land, if you don't count Antarctica, it's not that different of a population density than the other continents. And we have significant cities that were in place in the pre-Columbian era, in the era before Columbus and the European colonization. For example, you might have heard of the Aztecs, that's really the core, the Mexica people, the Mexica tribe, in many ways, the foundations of the Mexican people pre-European colonization. You might have also be familiar with the Mayan civilization, one of the longest-lasting civilizations in, actually, in history. They're famous for one of the earliest cultures where we have the hieroglyphics, where we have writing. You are probably familiar with the Inca Empire, and yes, that is me on a recent trip.