The Political Treatise, Spinoza's final work, is a largely theoretical inquiry into the fundamental principles of political philosophy. This edition offers an exceptional translation by Samuel Shirley and a prefatory essay by Douglas Den Uyl that discusses why the Political Treatise deserves the attention of contemporary scholars. Steven Barbone and Lee Rice provide ample notes, a substantial bibliography, complete indexes of names and terms, and a comprehensive general introduction, which considers the evolution of Spinoza's political thought in the context of the political and intellectual turmoil of the times, the relationship between the Political Treatise and the Theological-Political Treatise, and the importance of the Political Treatise to a full understanding of Spinoza's political philosophy.