In recent years a growing number of citizens have defected from the major parties to third party presidential candidates. Over the past three decades, independent campaigns led by George Wallace, John Anderson, and Ross Perot have attracted more electoral support than at any time since the 1920s. "Third Parties in America" explains why and when the two-party system deteriorates and third parties flourish. Relying on data from presidential elections between 1840 and 1992, it identifies the situations in which Americans abandon the major parties and shows how third parties encourage major party responsiveness and broader representation of political interests.

Elections are at the heart of the American political system, but in 1976 only 54 percent of the voting age population went to the polls. The question of who votes matters greatly to everyone involved in politics and to all those concerned about the current and future state of American democracy. Based on data from the 1972 and 1974 Census Bureau surveys, Wolfinger and Rosenstone are able to identify for the first time those social and economic groups that are most likely to vote and to explain sensibly and convincingly those factors that influence voter turnout.