The study of social movements from “below” has been a major element in political sociology, and perhaps the dominant tendency in social history, in recent decades. While bringing welcome attention to neglected historical actors and episodes, much of this literature carries a congratulatory air without managing to identify the results of such movements or to specify the mechanisms by which actors effect change from below. The four essays discussed here (three appear in this issue and one, by Mark Traugott, will appear in the next issue) all contribute to understanding the consequences of popular social action by placing it in the context of recurrent elite efforts to assert power. They demonstrate that examining the structure of social relations is a precondition for understanding the possibilities for, and effects of, agency by both elites and popular groups.