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34:39Now Playing
20:09Lesson 8 - The Direction of History - Part 3
Dr. Yuval Noah Harari
The Hebrew University of Jerusalem
After the Agricultural Revolution, humans created many different cultures and societies. The relations between these different societies were very complex, and involved wars and conflicts as well as trade, immigration and imitation. But as time went by, the connections between the societies became stronger and stronger, so that humankind was gradually united into a single global society. Three main forces shaped this process of unification. The first was money and trade. Money is the most universal system of mutual trust ever devised by humans. How come even people who believe in different gods and obey rival kings, are nevertheless willing to use the same money?
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