Saint-Preux is a fictional character created by the French philosopher and writer Jean-Jacques Rousseau. He appears in Rousseau's novel, Julie, or the New Heloise, published in 1761. Saint-Preux is depicted as a passionate and idealistic young man who experiences deep emotional struggles and romantic entanglements. The character embodies themes of love, nature, and the conflict between personal desires and societal expectations. Through Saint-Preux's experiences, Rousseau explores the complexities of human relationships and the impact of the Enlightenment on individual identity and emotions.