Marat/Sade is a play-within-a-play, written by Peter Weiss in the 1960s, that pits two legendary French revolutionary iconsJean-Paul Marat and the Marquess de Sadeagainst each other in a conflict of wits to determine what is better for their Fatherland and fellow citizens. Marat is a vocal critic of the aristocracy, de Sade a critic of the Revolution.