One of the main representatives of the French Enlightenment, Denis Diderot was a passionate critic of conventional morality, society, and religion. Among his most famous works, these two dialogues are brilliant examples of his radical scientific and philosophical beliefs. In "Rameau's Nephew," the eccentric and ridiculous nephew of the great composer Jean-Philippe Rameau accidentally meets Diderot, and the two embark on a ridiculous examination of society, music, literature, politics, morality, and philosophy. "D'Alembert's Dream" outlines a materialistic, atheistic view of the universe, expressed through the feverish dreams of Diderot's friend, d'Alembert. Unpublished during his lifetime, both of these powerfully controversial works show Diderot as one of the most advanced thinkers of his time and provide a compelling testimony to the philosopher's intellectual legacy.