Among the moral philosophers of this age may be mentioned Speroni, whose writings are distinguished by harmony, freedom, and eloquence of style; Tasso, whose dialogues unite loftiness of thought with elegance of style; Castiglione (1468-1529), whose "Cortigiano" is in equal estimation as a manual of elegance of manners and as a model of pure Italian; and Della Casa, whose "Galateo" is a complete system of politeness, couched in elegant language, and a work to which Lord Chesterfield was much indebted.
Political science had its greatest representative in Machiavelli, who wrote on it with that profound knowledge of the human heart which he had acquired in public life, and with the habit of unweaving, in all its intricacies, the political perfidy which then prevailed in Italy. The "Prince" is the best known of his political works, and from the infamous principles which he has here developed, though probably with good intentions, his name is allied with everything false and perfidious in politics. The object of the treatise is to show how a new prince may establish and consolidate his power, and how the Medici might not only confirm their authority in Florence, but extend it over the whole of the Peninsula. At the time that Machiavelli wrote, Italy had been for centuries a theatre where might was the only right. He was not a man given to illusive fancies, and throughout a long political career nothing had been permitted to escape his keen and penetrating eye. In all the affairs in which he had taken part he had seen that success was the only thing studied, and therefore to succeed in an enterprise, by whatever means, had become the fundamental idea of his political theory. His Prince reduced to a science the art, long before known and practiced by kings and tyrants, of attaining absolute power by deception and cruelty, and of maintaining it afterwards by the dissimulation of leniency and virtue. It does not appear that any exception was at first taken to the doctrines which have since called forth such severe reprehension, and from the moment of its appearance the Prince became a favorite at every court. But soon after the death of Machiavelli a violent outcry was raised against him, and although it was first heard with amazement, it soon became general, The Prince was laid under the ban of several successive popes, and the name of Machiavelli passed into a proverb of infamy. His bones lay undistinguished for nearly two centuries, when a monument was erected to his memory in the church of Santa Croce, through the influence of an English nobleman.