The Secret of Our Success summary

Ask most scientists why humans dominate the planet and you'll hear three answers. We’re smarter. We evolved specialized mental abilities for hunting and tracking. We cooperate better than other species. Each sounds plausible – until you examine the evidence.

Researchers tested young children against chimpanzees and orangutans on tasks measuring spatial thinking, numerical understanding, and causal reasoning. The children, despite much larger brains, performed no better. When it came to using objects as tools, chimps scored 74 percent correct while the kids managed only 23 percent. Children excelled in just one area: absorbing information from other people.

What about grown-ups? Japanese scientists pitted university students against young chimps in memory challenges where numbers briefly appeared on screens before vanishing. A chimp named Ayumu outperformed every human when the display time shortened. In strategy games requiring unpredictable choices, chimps consistently reached mathematically optimal play while humans made systematic errors. 

Real-world tests tell an even starker story. In 1845, a British expedition sailed into the Arctic with reinforced ships, steam engines, and provisions for five years. After ice trapped their vessels, 105 men died on King William Island, despite having spent years in the region. The local Inuit population lived comfortably on that same island, dwelling in structures built from snow, catching seals through ice holes, and hunting caribou with bows they crafted from driftwood. The men in the expedition never learned these techniques.

And they weren’t alone in their ignorance. In 1860, two explorers perished beside an Australian waterway despite eating several pounds daily of cakes they’d learned to prepare by watching local women. They’d missed steps in the processing method. The improperly prepared seeds drained their bodies of essential vitamins, causing them to waste away even as their stomachs stayed full. 

Sometimes, though, outsiders do survive. One leader of an Arctic expedition befriended the Inuit, studied their methods intensively, and returned home with most of his crew intact. And Norwegian explorer Roald Amundsen spent multiple winters mastering Inuit techniques before applying them to reach the South Pole ahead of his competitors. 

The difference isn’t raw intelligence, specialized mental abilities, or teamwork. Survival requires accessing a vast store of knowledge accumulated across many generations. Catching seals demands locating breathing holes in ice, testing them with carved implements, and deploying harpoons with removable tips attached by woven cord. You need to identify which frozen seawater has lost enough salt for drinking, extract oil from animal fat for lamps, and find specific mosses that serve as wicks. Each skill connects to dozens of others in an intricate web that no individual could recreate alone.

So the real secret to human dominance? It’s learning what others know and inheriting wisdom built up over time.