While the humanists were not primarily philosophers and belonged to no single school of formal thought, they had a great deal of influence upon philosophy. They searched out and copied the works of ancient authors, developed critical tools for establishing accurate texts from variant manuscripts, made translations from Latin and Greek, and wrote commentaries that reflected their broad learning and their new standards and points of view. Aristotle’s authority remained preeminent, especially in logic and physics, but humanists were instrumental in the revival of other Greek scientists and other ancient philosophies, including stoicism, skepticism, and various forms of Platonism, as, for example, the eclectic Neoplatonist and gnostic doctrines of the Alexandrian schools known as Hermetic philosophy. All of these were to have far-reaching effects on the subsequent development of European thought. While humanists had a variety of intellectual and scholarly aims, it is fair to say that, like the ancient Romans, they preferred moral philosophy to metaphysics. Their faith in the moral benefits of poetry and rhetoric inspired generations of scholars and educators. Their emphasis upon eloquence, worldly achievement, and fame brought them readers and patrons among merchants and princes and employment in government chancelleries and embassies.

Humanists were secularists in the sense that language, literature, politics, and history, rather than “sacred subjects,” were their central interests. They defended themselves against charges from conservatives that their preference for Classical authors was ruining Christian morals and faith, arguing that a solid grounding in the classics was the best preparation for the Christian life. This was already a perennial debate, almost as old as Christianity itself, with neither side able to prove its case. There seems to have been little atheism or dechristianization among the humanists or their pupils, although there were efforts to redefine the relationship between religious and secular culture. Petrarch struggled with the problem in his book Secretum meum (1342–43, revised 1353–58), in which he imagines himself chastised by St. Augustine for his pursuit of worldly fame. Even the most celebrated of Renaissance themes, the “dignity of man,” best known in the Oration on the Dignity of Man (1486) by Giovanni Pico della Mirandola, was derived in part from the Church Fathers. Created in the image and likeness of God, people were free to shape their destiny, but human destiny was defined within a Christian Neoplatonic context of contemplative thought.

You will have the power to sink to the lower forms of life, which are brutish. You will have the power, through your own judgment, to be reborn into the higher forms, which are divine.

Perhaps because Italian politics were so intense and innovative, the tension between traditional Christian teachings and actual behaviour was more frankly acknowledged in political thought than in most other fields. The leading spokesman of the new approach to politics was Niccolò Machiavelli. Best known as the author of The Prince (1513), a short treatise on how to acquire power, create a state, and keep it, Machiavelli dared to argue that success in politics had its own rules. This so shocked his readers that they coined his name into synonyms for the Devil (“Old Nick”) and for crafty, unscrupulous tactics (Machiavellian). No other name, except perhaps that of the Borgias, so readily evokes the image of the wicked Renaissance, and, indeed, Cesare Borgia was one of Machiavelli’s chief models for The Prince.

Machiavelli began with the not unchristian axiom that people are immoderate in their ambitions and desires and likely to oppress each other whenever free to do so. To get them to limit their selfishness and act for the common good should be the lofty, almost holy, purpose of governments. How to establish and maintain governments that do this was the central problem of politics, made acute for Machiavelli by the twin disasters of his time, the decline of free government in the city-states and the overrunning of Italy by French, German, and Spanish armies. In The Prince he advocated his emergency solution: Italy needed a new leader, who would unify the people, drive out “the barbarians,” and reestablish civic virtue. But in the Discourses on the First Ten Books of Livy (1517), a more detached and extended discussion, he analyzed the foundations and practice of republican government, still trying to explain how stubborn and defective human material was transformed into political community.

Machiavelli was influenced by humanist culture in many ways, including his reverence for Classical antiquity, his concern with politics, and his effort to evaluate the impact of fortune as against free choice in human life. The “new path” in politics that he announced in The Prince was an effort to provide a guide for political action based on the lessons of history and his own experience as a foreign secretary in Florence. In his passionate republicanism he showed himself to be the heir of the great humanists of a century earlier who had expounded the ideals of free citizenship and explored the uses of Classicism for the public life.

At the beginning of the 15th century, when the Visconti rulers of Milan were threatening to overrun Florence, the humanist chancellor Coluccio Salutati had rallied the Florentines by reminding them that their city was “the daughter of Rome” and the legatee of Roman justice and liberty. Salutati’s pupil, Leonardo Bruni, who also served as chancellor, took up this line in his panegyrics of Florence and in his Historiarum Florentini populi libri XII (“Twelve Books of Histories of the Florentine People”). Even before the rise of Rome, according to Bruni, the Etruscans had founded free cities in Tuscany, so the roots of Florentine liberty went very deep. There equality was recognized in justice and opportunity for all citizens, and the claims of individual excellence were rewarded in public offices and public honours. This close relation between freedom and achievement, argued Bruni, explained Florence’s superiority in culture as well as in politics. Florence was the home of Italy’s greatest poets, the pioneer in both vernacular and Latin literature, and the seat of the Greek revival and of eloquence. In short, Florence was the centre of the studia humanitatis.

As political rhetoric, Bruni’s version of Florentine superiority was magnificent and no doubt effective. It inspired the Florentines to hold out against Milanese aggression and to reshape their identity as the seat of “the rebirth of letters” and the champions of freedom; but, as a theory of political culture, this “civic humanism,” as Hans Baron has called it, represented the ideal rather than the reality of 15th-century communal history. Even in Florence, where after 1434 the Medici family held a grip on the city’s republican government, opportunities for the active life began to fade. The emphasis in thought began to shift from civic humanism to Neoplatonist idealism and to the kind of utopian mysticism represented by Pico’s Oration on the Dignity of Man. At the end of the century, Florentines briefly put themselves into the hands of the millennialist Dominican preacher Fra Girolamo Savonarola, who envisioned the city as the “New Jerusalem” rather than as a reincarnation of ancient Rome. Still, even Savonarola borrowed from the civic tradition of the humanists for his political reforms (and for his idea of Florentine superiority) and in so doing created a bridge between the republican past and the crisis years of the early 16th century. Machiavelli got his first job in the Florentine chancellery in 1498, the year of Savonarola’s fall from power. Dismissing the friar as one of history’s “unarmed prophets” who are bound to fail, Machiavelli was convinced that the precepts of Christianity had helped make the Italian states sluggish and weak. He regarded religion as an indispensable component of human life, but statecraft as a discipline based on its own rules and no more to be subordinated to Christianity than were jurisprudence or medicine. The simplest example of the difference between Christian and political morality is provided by warfare, where the use of deception, so detestable in every other kind of action, is necessary, praiseworthy, even glorious. In the Discourses, Machiavelli commented upon a Roman defeat:

This is worth noting by every citizen who is called upon to give counsel to his country, for when the very safety of the country is at stake there should be no question of justice or injustice, of mercy or cruelty, of honour or disgrace, but putting every other consideration aside, that course should be followed which will save her life and liberty.

Machiavelli’s own country was Florence; when he wrote that he loved his country more than he loved his soul, he was consciously forsaking Christian ethics for the morality of civic virtue. His friend and countryman Francesco Guicciardini shared his political morality and his concern for politics but lacked his faith that a knowledge of ancient political wisdom would redeem the liberty of Italy. Guicciardini was an upper-class Florentine who chose a career in public administration and devoted his leisure to writing history and reflecting on politics. He was steeped in the humanist traditions of Florence and was a dedicated republican, notwithstanding the fact—or perhaps because of it—that he spent his entire career in the service of the Medici and rose to high positions under them. But Guicciardini, more skeptical and aristocratic than Machiavelli, was also half a generation younger, and he was schooled in an age that was already witnessing the decline of Italian autonomy.

In 1527 Florence revolted against the Medici a second time and established a republic. As a confidant of the Medici, Guicciardini was passed over for public office and retired to his estate. One of the fruits of this enforced leisure was the so-called Cose fiorentine (Florentine Affairs), an unfinished manuscript on Florentine history. While it generally follows the classic form of humanist civic history, the fragment contains some significant departures from this tradition. No longer is the history of the city treated in isolation; Guicciardini was becoming aware that the political fortunes of Florence were interwoven with those of Italy as a whole and that the French invasion of Italy in 1494 was a turning point in Italian history. He returned to public life with the restoration of the Medici in 1530 and was involved in the events leading to the tightening of the imperial grip upon Italy, the humbling of the papacy, and the final transformation of the republic of Florence into a hereditary Medici dukedom. Frustrated in his efforts to influence the rulers of Florence, he again retired to his villa to write; but, instead of taking up the unfinished manuscript on Florentine history, he chose a subject commensurate with his changed perspective on Italian affairs. The result was his History of Italy. Though still in the humanist form and style, it was in substance a fulfillment of the new tendencies already evident in the earlier work—criticism of sources, great attention to detail, avoidance of moral generalizations, shrewd analysis of character and motive.

The History of Italy has rightly been called a tragedy by the American historian Felix Gilbert, for it demonstrates how, out of stupidity and weakness, people make mistakes that gradually narrow the range of their freedom to choose alternative courses and thus to influence events until, finally, they are trapped in the web of fortune. This view of history was already far from the world of Machiavelli, not to mention that of the civic humanists. Where Machiavelli believed that virtù—bold and intelligent initiative—could shape, if not totally control, fortuna—the play of external forces—Guicciardini was skeptical about men’s ability to learn from the past and pessimistic about the individual’s power to shape the course of events. All that was left, he believed, was to understand. Guicciardini wrote his histories of Florence and of Italy to show what people were like and to explain how they had reached their present circumstances. Human dignity, then, consisted not in the exercise of will to shape destiny but in the use of reason to contemplate and perhaps to tolerate fate. In taking a new, hard look at the human condition, Guicciardini represents the decline of humanist optimism.