"A brilliant and groundbreaking argument that innovation and progress are often achieved by revisiting and retooling ideas from the past rather than starting from scratch--from The Guardian columnist and contributor to The Atlantic,"--Baker & Taylor.

When Karl Marx was buried at Highgate Cemetery in North London in 1883, his longtime friend and collaborator, Friedrich Engels, remarked that he was "above all a revolutionary." For Marx, the struggle to accurately describe or interpret the world in rational terms was not enough; the point of politics and philosophy was not to diagnose human society but to change it. According to Marx, history was defined by class conflict, with the state heretofore...

The "Long Debate" on the nature of truth, the scale of real values, the life one should aspire to live, the character of justice, the sources of law, and the terms of civic and political life is encompassed by the name philosophy. Three persistent themes--understood as problems--are knowledge, conduct, and governance, on which there is a storehouse of insights, some so utterly persuasive as to have shaped thought itself. Beginning with Plato and Aristotle,...