S idney Verba, Kay Lehman Schlozman, and Henry E. Brady (VSB) have concentrated scholarly attention on the inequality of political voice in America. Employing an innovative survey design that produced a novel data set of political activists, VSB demonstrate that activists and nonactivists have different sets of policy concerns and that different modes of participation send different messages to public officials. In short, the participatory process-which they argue is based on citizen resources, psychological engagement, and access to networks-is biased. More participatory equality would yield a different mix of policy messages to political leaders. We asked three senior scholars, who approach the problem of participation in America from different angles, to evaluate VSB's work. They declare Voice and Equality a modern masterpiece of political science and probe the best they can for weakness. John H. Aldrich emphasizes positive theory. He stresses the limits to assuming that all acts of political participation are part of the same theoretical universe and therefore to constructing a measure of the overall volume of participation. Aldrich argues that only a domain-specific approach to participation (e.g., elections, community action, interest-group politics) that focuses on an actor's goals and his or her interactions with other actors and institutions in the domain can explain why someone is an activist. Jane Mansbridge highlights normative theory. She observes that adversarial theories of democracy suggest that the inequality of participation matters because it affects the Who gets what? question, while participatory theories of democracy suggest that inequality matters because it affects the Who are we as citizens? question. Mansbridge argues that research must be concerned with both the distributive and educative effects of participation. Finally, Jennifer L. Hochschild stresses practical politics. For example, she notes the limits of VSB's finding that group identity is irrelevant to political activism. Hochschild proposes an empirical investigation of how group-specific factors (e.g., black consciousness) affect participation. In sum, the reviewers maintain that VSB's general theory of political participation in America must address contextually specific and historically disaggregated factors: particular goals and domains of political activity, the redefinition of political values that occurs during the political process, and group-level forces of identity and consciousness. In a rejoinder, VSB defend their work and yet graciously accept the many useful suggestions made by Aldrich, Mansbridge, and Hochschild. The discipline's ongoing research agenda should explore participation, representation, and democracy in America.