The Importance of Cooperation

I recently watched What Explains the Rise of Humans? by historian Yuval Noah Harari. Harari starts by pointing out that tens of thousands of years ago, humans were pretty insignificant animals. Today, we have an enormous amount of control over the planet. His explanation is that humans became so successful because we can cooperate flexibly in very large groups.

The part I found most interesting was how Harari explains that cooperation. He says humans can create shared stories and then organize around them. Money is probably the easiest example. A dollar bill does not have much value on its own, but millions of people agree that it represents value, so we can use it to buy food, pay for services, or trade with complete strangers. The same basic idea applies to things like countries, companies, laws, and human rights. They only work because large numbers of people agree to honor them as real.

Harari also compares humans with other animals. Bees and ants can cooperate in huge groups, but their behavior is much more fixed. Chimpanzees can cooperate in more flexible ways, but usually only in smaller groups where they know the other members. Humans are able to do both. People who have never met can still follow the same rules or work toward the same goal. That's how people can build cities, run governments, or create companies with thousands of employees.

I usually think about evolution in terms of physical changes, like walking upright or developing larger brains. Harari made me think more about what humans are actually able to do with those changes. A larger brain matters because it lets us communicate, imagine things, and convince other people to believe in the same ideas. Once enough people accept the same story or system, they can coordinate on a scale that other animals cannot.