Machiavelli is an Italian Renaissance political philosopher and statesman, Secretary of the Florentine Republic. Although he was familiar with classical humanists such as Plato, whose teaching was widely present in Italy during Machiavelli, this renaissance philosopher belonged to that group, which did not particularly care for ancient humanists, namely, Plato's influence on Renaissance philosophers during Machiavellia varied. Machiavelli was a kind of innovator, relying on his own ideas from his time. So he was the creator of the work of Il Principe, ie The Prince, which created himself a reputation as an atheist and immoral cynic. For Machiavelli, it can be said that he was a humanist of his time with not too much respect for proven historical authorities
The answer is: Humanism.