Intellectual setting
Machiavelli wrote "The Prince" after his exclusion from Florentine politics by the returning Medici, drawing on his firsthand diplomatic experience observing rulers such as Cesare Borgia, while the "Discourses on Livy" reflects his own republican political commitments developed during his years as a Florentine civil servant.
Key ideas
The autonomy of political effectiveness from conventional morality
Machiavelli argued that a ruler's success depends on understanding how power is actually acquired and kept, which sometimes requires departing from conventional moral virtue while maintaining its appearance, distinguishing political realism from idealized accounts of just rule.
Virtù and fortuna
Machiavelli held that political success depends on a ruler's or citizen's virtù - skill, decisiveness, and adaptability - as the primary means of mastering fortuna, the unpredictable force of chance and circumstance that governs much of political life.
Legacy
Machiavelli is regarded as a founder of modern political realism; "The Prince" remains one of the most influential and controversial texts in the history of political thought, and his name gave rise to the term "Machiavellian" for cunning, power-focused political strategy.