Examining the many features of the history of the right to vote in the U.S.—class, ethnicity, race, gender, religion, and age—the book explores the conditions under which American democracy has expanded and contracted over the years.Keyssar presents convincing evidence that the history of the right to vote has not been one of a steady history of expansion and increasing inclusion, noting that voting rights contracted substantially in the U.S. between 1850 and 1920. Keyssar also presents a controversial thesis: that the primary factor promoting the expansion of the suffrage has been war and the primary factors promoting contraction or delaying expansion have been class tension and class conflict.