And now Europeans over the centuries kind of had weeded themselves down to people that had good immunity systems. So they're not being ravaged by these diseases, but the Native Americans, their immunity systems, they know not smallpox. They know not the plague or yellow fever. Now that population total we talked about, between 40 and 100 million in 1492, that's going to be cut by 90% within a couple hundred years. It's not really guns that are going to kill the Native Americans. It's not going to be wars that are going to kill the Native Americans. It's going to be smallpox.