Buchanan and Tullock's seminal work, The Calculus of Consent, linked economic methodology to substantive questions in political science. Among the major contributions of the book is a connection between constitutional decision making and contractarianism, a philosophical tradition that proponents believe can give institutions legitimacy. In other words, a major contribution of their book is a clear connection between empirical decision making and normative principles. This book formalizes and extends this foundational work as it attempts to show how economic and philosophical arguments...