Marx's ideas are now subject to worldwide reappraisal, with conferences attracting the most important critical thinkers on the left. Marx and the Aesthetic (Amsterdam, 2012) reappraised Marx in the context of his own creative inspirations and contemporary art today. Max Raphael's Proudhon, Marx, Picasso (1933), published in Paris by the exiled German art historian, a contemporary of Walter Benjamin, included the first attempt at a Marxist critique...