Which Renaissance writer was a humanist because of his focus on human nature, rather than religion?

Niccolò Machiavelli is the best answer because his political writing focused on human behavior, ambition, and how people gain and keep power. His approach emphasized human nature and practical political realities more than religious teachings. Baldassare Castiglione also wrote about human ideals, but Machiavelli is especially associated with this secular focus.

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