Book excerpt: This book examines the origins of philosophy in Greek Antiquity and considers key moments of philosophic history as related to revolutionary change, from the French Revolution of 1789 to the May Events of 1968 and beyond. David Black reads Hegel's philosophy--which seems to come to the fore at various "birthtimes in history"--as anticipating Marx's critique of capital, in which the logic of the system intimates a realm beyond it.