How should we understand the relationship between global justice and global democracy? One popular view is captured by the aphorism “No global justice without global democracy.” According to Dryzek and Tanasoca's reading of this aphorism, a particular form of deliberative global democracy is seen as the way to specify and justify what global justice is and requires in various contexts. Taking its point of departure in a criticism of this proposal, this essay analyzes how to best understand the relationship between global justice and global democracy. The aim is not to offer a first-order substantial account of this relationship, but to theorize the normative boundary conditions for such an account; that is, the conditions that any plausible theory should respect. These conditions take the form of what is here called a “three-layered view,” which is specified through three claims. It is argued, first, that global democracy is best seen as a partial normative ideal; second, that global democracy must be grounded in fundamental principles of justice; and third, that global democracy is an ideal through which applied principles of distributive justice are formulated and justified in light of reasonable disagreement about what justice requires.