The book focuses on influential rabbi Saul Levi Morteira (b. ca. 1590-d. 1660), as well as two of the most renowned members of his congregation, Baruch Spinoza and Miguel de Barrios. Unlike contemporary Catholic and Protestant thinkers, these three intellectuals found democratic values in an Old Testament polity that came to be revered as the Hebrew Republic. The book explores the trajectory by which this democratization of the Hebrew Republic evolved in the writings of Morteira as an alternative to divine-right rule. It then shows that, in spite of their divergent views toward practicing Judaism, Spinoza and Barrios disseminated Morteira’s democratic ideas and promoted the Hebrew Republic as a model polity for a post-medieval political order. This book will be of great use to scholars of Judaism and Jewish philosophy in the modern era, medieval and early modern Spanish literature, as well as religious, political and intellectual history.