In this important and wide-ranging book, a leading political theorist and activist considers the question: What justifies democracy? Carlos Santiago Nino critically examines answers others have given and then develops his own distinctive theory of democracy, emphasizing its deliberative character. In Nino's view, democracy resembles a moral conversation and is valued because of its capacity to generate an impartial perspective, one that takes into account the interests of all citizens. Nino's conception of deliberative democracy bears on the way power is organized under a constitution. Drawing on a variety of constitutional traditions, he criticizes the presidential system and calls for citizens to participate more directly in the political life of their country.