What Is the Third Estate? was the most influential pamphlet of 1789. It did much to set the French Revolution on a radically democratic course. It also launched its author, the Abb Sieyes, on a remarkable political career that spanned the entire revolutionary decade. Sieyes both opened the revolution by authoring the National Assembly's declaration of sovereignty in June of 1789 and closed it in 1799 by engineering Napoleon Bonaparte's coup...