Scholars have long contemplated the connection between language and thought—and to what degree the two are intertwined—by asking whether language is somehow an essential prerequisite for thinking.
British philosopher and mathematician Bertrand Russell answered the question with a flat yes, asserting that language’s very purpose is “to make possible thoughts which could not exist without it.” But even a cursory glance around the natural world suggests why Russell may be wrong: No words are needed for animals to perform all sorts of problem-solving challenges that demonstrate high-level cognition. Chimps can outplay humans in a strategy game, and New Caledonian Crows make their own tools that enable them to capture prey.