Key Ideas

Think about the following questions as you watch the video

1. 01:42 What are the four world zones?
2. 03:32 What are the theories of why humans created agriculture?
3. 04:26 What were some of the positive and negative impacts of agriculture?
4. 05:43 When and where did agriculture emerge around the world and how did this impact where the first states emerged?
5. 07:47 What is the Hobbes versus Rousseau debate?
6. 09:10 What does Hank Green claim is the underlying theme in all of human history?
7. 11:12 How did collective learning raise the carrying capacity of the world during the agrarian era?
8. 12:41 What was the typical cycle of population rise and decline in the agrarian era?