Psychology Today | 06.02.2026 22:40
Somewhere between six and seven million years ago, our ancestors began walking upright, and the advantages were considerable: Freed from locomotion, upper limbs could grasp, manipulate, eventually craft, and the opposable thumb became the hinge on which human civilization would turn. We are, above all else, tool users—fire, the wheel, writing, the printing press, the transistor—each tool reshaping not only what we could do but who we became.
