You don't have people that are working in the crops. You don't have enough people to fight off enemies. And there's going to be huge consequences because their arm is going to be down. Now when the Europeans come, and we think about the Europeans against the Native Americans and how the Europeans were so superior, well, if you wiped out 90% of a population, I probably could have taken over as well. So that's going to be a huge one in terms of the old world bringing these diseases to the new world. Now in terms of the other way around, were there diseases that went back to Europe? And certainly archaeologists have found that Native Americans had arthritis, so they got arthritis.