To show that modern nations are increasing the ease and comfort of life to a point unknown before is no difficult task. Chastellux enumerates the discoveries of physical science, and touches on the achievements of learning and the arts, then calls on his readers to look on all these but as payments on account in the progress of our knowledge; as so much of the road already passed in the vast course of the human mind. Here we have the truly modern ideal of progress; the end of government the greatest happiness of the greatest number, and happiness dependent merely on material conditions. Morals under this system are but a branch of medicine. Religion is an old-fashioned prejudice. Let us push on and unite the world in one great, comfortable, well-fed family. Such is the last practical advice of the French Philosophic school of the eighteenth century and of its unconscious followers in this. If the conclusion does not satisfy the highest aspirations of the human race, that is perhaps because of some flaw in the premises. CHAPTER XVIII. ROUSSEAU'S POLITICAL WRITINGS. In passing from the study of the Philosophers to that of Rousseau, we turn from talent to genius, from system to impulse. The theories of the great Genevan were drawn from his own strange nature, with little regard for consistency. They belong together much as the features of a distorted and changeful countenance may do; their unity is personal rather than systematic. And while Rousseau was, from certain aspects and chiefly in respect to his conduct, the most contemptible of the great thinkers of his day, he surpassed most of the others in constant literary sincerity, and in occasional elevation of thought and feeling. Voltaire, although never swerving long from his own general philosophical scheme, would lie without hesitation for any purpose. Diderot would quote from non-existent books to establish his theories. But no one can read Rousseau without being convinced that he believed what he wrote, at least at the moment of writing it. Truthfulness of this kind is quite consistent with inaccuracy, and it is probable that some incidents in Rousseau's autobiographical writings have been wrongly remembered, colored by prejudice, or embellished by vanity. Some of them may even be completely fictitious; the author caring little for facts except as the ornaments and illustrations of ideas. But what he thought in the abstract Rousseau was quite ready to write down, caring little for the feelings or the opinions of any sect or party; or even of that great public whose thought was as law to the Philosophers. He deserved to profit by his sincerity, and he has done so. His many and great faults were well known to his contemporaries; they are told in his posthumous "Confessions" in a way to show them more dark than any contemporary could have imagined; yet such is the evident frankness of those evil and repugnant volumes that many decent men have got from them