The procedural justice literature has grown enormously since the early work of Thibaut and Walker in the 1970s. Since then, the finding that citizens care enormously about the process by which outcomes are reached—even unfavorable outcomes—has been replicated a wide range of methodologies (including panel surveys, psychometric work, and experimentation), cultures (throughout North America, Europe, and Asia), and settings (including tort litigation, policing, taxpayer compliance, support for public policies, and organizational citizenship). We have learned a great deal about the antecedents and consequences of these judgments. In particular, the work of Tom Tyler and Allan Lind and their colleagues suggests that people care about voice, dignity, and respect for relational and symbolic reasons rather than (or in addition to) instrumental reasons. This finding has benevolent implications for governance and social cooperation, but also some troubling implications, leaving people susceptible to manipulation and exploitation.