The Second Reform Act, passed in 1867, created a million new voters, doubling the electorate and propelling the British state into the age of mass politics. It marked the end of a twenty year struggle for the working class vote, in which seven different governments had promised change. Yet the standard works on 1867 are more than forty years old and no study has ever been published of reform in prior decades. This study provides the first analysis of the subject from 1848 to 1867, ranging from the demise of Chartism to the passage of the Second Reform Act. Recapturing the vibrancy of the issue and its place at the heart of Victorian political culture, it focuses not only on the reform debate itself, but on a whole series of related controversies, including the growth of trade unionism, the impact of the 1848 revolutions and the discussion of French and American democracy.