Many authors have already observed that the Tractatus Theologico-Politicus of Baruch Spinoza was, in its time, the most discussed and most vehemently refuted book. Indeed, at the dawn of the Enlightenment, and almost until the end of the XIX century, Spinoza's Theological-Political Treatise was an assertive and powerful appeal to freedom of expression and thought, a bold claim of religious tolerance and freedom of conscience in a Europe that was unaccustomed to the exercise of free thought. But, what is after all the subject of the Theological-Political Treatise, a book maligned for so long and by so many as ultra pestilential and immoral? The present volume, collecting a bunch of essays by notable European scholars, attempts to address some of the problems created by the broad spectrum of topics included in Spinoza's Theological-Political Treatise.