ABSTRACT
All animals seize and crush their food in their mouths or gullets, and many seize it first with their paws and tear it with claws or talons. Now every human infant has a like native impulse and power to seize any small object at hand; and if, when older and stronger, he seizes a heavy stick, he will immensely increase the range and power of his arm to strike a blow. Similarly if he seizes a pointed stone, he may easily break things that defy his teeth. Such sticks and stones are the primitive instruments of human art, and simply extend beyond the living body the functions of teeth and claws.
