Kant saw the mass of empirical and hence irrelevant detail that had found refuge within this liberal and diffusive reason. He saw that the idea of reason could be made self-consistent only by stripping it naked of these empirical accretions. He then provided, in his critiques, a somewhat cumbrous moving van for transferring the resultant pure or naked reason out of nature and the objective world, and for locating it in new quarters, with a new stock of goods and new customers. The new quarters were particular subjects, individuals; the stock of goods were the forms of perception and the functions of thought by which empirical flux is woven into durable fabrics; the new customers were a society of individuals in which all are ends in themselves. There ought to be an injunction issued that Kant’s saying about Hume’s awakening of him should not be quoted save in connection with his other saying that Rousseau brought him to himself, in teaching him that the philosopher is of less account than the laborer in the fields unless he contributes to human freedom. But none the less, the new tenant, the universal reason, and the old homestead, the empirical tumultuous individual, could not get on together. Reason became a mere voice which, having nothing in particular to say, said Law, Duty, in general, leaving to the existing social order of the Prussia of Frederick the Great the congenial task of declaring just what was obligatory in the concrete. The marriage of freedom and authority was thus celebrated with the understanding that sentimental primacy went to the former and practical control to the latter. The effort to force a universal reason that had been used to the broad domains of the cosmos into the cramped confines of individuality conceived as merely “empirical,” a highly particularized creature of sense, could have but one result: an explosion. The products of that explosion constitute the Post-Kantian philosophies. It was the work of Hegel to attempt to fill in the empty reason of Kant with the concrete contents of history. The voice sounded like the voice of Aristotle, Thomas of Aquino, and Spinoza translated into Swabian German; but the hands were as the hands of Montesquieu, Herder, Condorcet, and the rising historical school. The outcome was the assertion that history is reason, and reason is history: the actual is rational, the rational is the actual. It gave the pleasant appearance (which Hegel did not strenuously discourage) of being specifically an idealization of the Prussian nation, and incidentally a systematized apologetic for the universe at large. But in intellectual and practical effect, it lifted the idea of process above that of fixed origins and fixed ends, and presented the social and moral order, as well as the intellectual, as a scene of becoming, and it located reason somewhere within the struggles of life.