Interestingly one of the negative effects of the domestication of animals is that lots of people are going to die because animals bring diseases. We're going to get the measles and influenza and smallpox. But again through survival of the fittest, through evolution, people that do survive are going to pass on those stronger immunity systems that are going to protect them from those diseases to their offspring. We're also going to talk about the division of labor. For the first time not everybody is hunting and gathering. So you have an opportunity not only for art and having art that you don't have to carry on your back. Imagine doing Stonehenge in the Paleolithic Age.