Claude-Adrien Helvétius was a materialist philosopher and French writer, an important figure of the Enlightenment. Born in Paris, he was the son of a court physician. Helvétius argued that self-interest was the main driver of human actions and that education and the social environment shaped individuals' character and intelligence. His work "De l'esprit" (On the Mind), published in 1758, argued that intellectual differences between people were the result of their experiences and education, not innate predispositions. He also criticized religion and social institutions that, in his view, limited human progress and happiness. The publication of "De l'esprit" generated immense controversy, leading to the censorship and prohibition of the book. Despite the controversy, Helvétius's ideas influenced later thinkers and contributed to the development of liberal and utilitarian thought.