In his essay The Eighteenth Brumaire of Louis Bonaparte, Karl Marx commented that The tradition of all the dead generations weighs like a nightmare on the brain of the living. In this famous remark, as in so many other ways, Marx expressed with a unique stylistic genius the spirit of our age, which regards every impediment to its restless acceleration as a barrier to be overcome—as a dead weight that must be cast off if the two great reigning ideals of our time, the ideals of freedom and speed, are to be honored in the way they demand. To many today the past is a dead weight of this kind, a vast repository of error and prejudice, of silliness and superstition, a realm of moral and material backwardness whose only continuing utility for us...