This book focuses on the idea of a modus vivendi as a way of governing political life and addressing problems characterized by pluralism or deep-rooted diversity. The individual essays illustrate both the merits and the limitations of a political theory of modus vivendi; how it might be interpreted and developed; specific challenges entailed by articulating it in a convincing form; what its institutional implications might be; and how it relates to other seminal issues and concepts in political theory; such as legitimacy, toleration, the social contract, etc. The book makes a significant contribution to the discussion on the scope and limits of liberal political theory, and on how to deal politically with deep-rooted diversity.