“During the Old Stone Age, between thirty-seven thousand and eleven thousand years ago, some of the most remarkable art ever conceived was etched or painted on the walls of caves in southern France and northern Spain. After a visit to Lascaux, in the Dordogne, which was discovered in 1940, Picasso reportedly said to his guide, “They’ve invented everything.” What those first artists invented was a language of signs for which there will never be a Rosetta stone; perspective, a technique that was not rediscovered until the Athenian Golden Age; and a bestiary of such vitality and finesse that, by the flicker of torchlight, the animals seem to surge from the walls, and move across them like figures in a magiclantern show (in that sense, the artists invented animation). They also thought up the grease lamp—a lump of fat, with a plant wick, placed in a hollow stone—to light their workplace; scaffolds to reach high places; the principles of stencilling and Pointillism; powdered colors, brushes, and stumping cloths; and, more to the point of Picasso’s insight, the very concept of an image. A true artist reimagines that concept with every blank canvas—but not from a void.”