One of the most challenging problems in the history of Western ideas stems from the emergence of Modernity out of the preceding period of the Latin Middle Ages. This volume develops and extends the insights of the noted scholar Thomas M. Izbicki into the so-called medieval/modern divide. The contributors include a wide array of eminent international scholars from the fields of History, Theology, Philosophy, and Political Science, all of whom explore how medieval ideas framed and shaped the thought of later centuries. This sometimes involved the evolution of intellectual principles associated with the definition and imposition of religious orthodoxy. Also addressed is the Great Schism in the Roman Church that set into question the foundations of ecclesiology. In the same era, philosophical and theoretical innovations reexamined conventional beliefs about metaphysics, epistemology and political life, perhaps best encapsulated by the fifteenth-century philosopher, theologian and political theorist Nicholas of Cusa.