Human beings have always been tool users. Fire let us wake little suns; arrowheads gave us talons like eagles; wolfskins sent us out across Ice Age Europe; and language—whether spoken, written, printed, or coded—fueled every innovation since.
Our brains require such tools. After all, those three-pound puddings of nerve and fat in our skulls haven’t changed much since we first fashioned arrowheads. In fact, in her new book, The Extended Mind, Annie Murphy Paul argues that we’re probably already using our brains at near-peak capacity.
Thinking harder is not the answer.