Back in the salad days of the 20th century, when artists in Paris were setting off the firecrackers that detonated abstract art, Picasso and Braque were the good cubist boys. Duchamp and Picabia, with their eroticized machine fantasies, were naughtier. As the trajectory of modern styles arced across the century, circling the globe and fizzling out, Duchamp—who claimed to have stopped making art—was gradually and grudgingly anointed renegade guru. Picabia, however, having turned unforgivably retrograde, long ago became the modern... More >>>