A higher and nobler spirit, who perished in the Revolution, but ceased not till his last moment to hope and labour for the good of men, was J.-A.-N. de Caritat, Marquis de CONDORCET (1743-94). Illustrious in mathematical science, he was interested by Turgot in political economy, and took a part in the polemics of theology. While lying concealed from the emissaries of Robespierre he wrote his _Esquisse d'un Tableau Historique des Progres de l'Esprit Humain_. It is a philosophy of the past, and almost a hymn in honour of human perfectibility. The man-statue of Condillac, receiving, retaining, distinguishing, and combining sensations, has gradually developed, through nine successive epochs, from that of the hunter and fisher to the citizen of 1789, who comprehends the physical universe with Newton, human nature with Locke and Condillac, and society with Turgot and Rousseau. In the vision of the future, with its progress in knowledge and in morals, its individual and social improvement, its lessening inequalities between nations and classes, the philosopher finds his consolation for all the calamities of the present age. Condorcet died in prison, poisoned, it is believed, by his own hand. The economists, or, as Dupont de Nemours named them, the physiocrats, formed a not unimportant wing of the philosophic phalanx, now in harmony with the Encyclopaedic party, now in hostility. The sense of the misery of France was present to many minds in the opening of the century, and with the death of Louis XIV. came illusive hopes of amelioration. The Abbe de Saint-Pierre (1658-1743), filled with ardent zeal for human happiness, condemned the government of the departed Grand Monarch, and dreamed of a perpetual peace; among his dreams arose projects for the improvement of society which were justified by time. Boisguillebert, and Vauban, marshal of France and military engineer, were no visionary spirits; they pleaded for a serious consideration of the general welfare, and especially the welfare of the agricultural class, the wealth-producers of the community. To violate economic laws, Boisguillebert declared, is to violate nature; let governments restrain their meddling, and permit natural forces to operate with freedom.