By Alison Gopnik
The Atlantic
May 2016
Here is an excerpt:
Psychologists often assume that there is a special cognitive ability—a psychological secret sauce—that makes humans different from other animals. The list of candidates is long: tool use, cultural transmission, the ability to imagine the future or to understand other minds, and so on. But every one of these abilities shows up in at least some other species in at least some form. De Waal points out various examples, and there are many more. New Caledonian crows make elaborate tools, shaping branches into pointed, barbed termite-extraction devices. A few Japanese macaques learned to wash sweet potatoes and even to dip them in the sea to make them more salty, and passed that technique on to subsequent generations. Western scrub jays “cache”—they hide food for later use—and studies have shown that they anticipate what they will need in the future, rather than acting on what they need now.
From an evolutionary perspective, it makes sense that these human abilities also appear in other species. After all, the whole point of natural selection is that small variations among existing organisms can eventually give rise to new species. Our hands and hips and those of our primate relatives gradually diverged from the hands and hips of common ancestors. It’s not that we miraculously grew hands and hips and other animals didn’t. So why would we alone possess some distinctive cognitive skill that no other species has in any form?
The article is here.
