We are exceptionally smart, and this helps us adapt to a wide range of environments. But we are not nearly smart enough as individuals ① to solve the adaptive problems that confronted modern humans as they spread across the globe. The package of tools, foraging techniques, ecological knowledge, and social arrangements used by any group of foragers ② being far too complex for any individual to create. We are able to learn all the things we need to know in each of the many different environments ③ in which we live only because we acquire information from others. We are much better at learning from others than other species are, and we are ④ motivated to learn from others even when we do not understand why our models are doing what they are doing. This psychology allows human populations to accumulate pools of adaptive information that ⑤ greatly exceed the inventive capacities of individuals.
* forage: 구하러 다니다