This book explores Hume's concern with the destructiveness of religious factions and his efforts to develop, in his moral philosophy, a solution to factional conflict. Sympathy and the related capacity to enter into foreign points of view are crucial to the neutralization of religious zeal and the naturalization of ethics. Jennifer Herdt suggests that Hume's preoccupation with religious faction is the key which reveals the unity of his varied philosophical, aesthetic, political, and historical works.