1. Social Democracy in 1928. The SPD's Fraternal Organizations. Political Tendencies in the SPD. Organization of the SPD. The Social Composition of the SPD and Its Electorate. The SPD's Ideology -- 2. Indian Summer. The 1928 Election Campaign. Analyzing the Election Results. The Panzerkreuzer Affair. The Controversy over Unemployment Insurance. Opposition, March-August 1930 -- 3. Where Stands the Enemy? Assessing the Republic's Situation. The 1930 Campaign -- 4. The Struggle Begins. Origins of the Toleration Policy. Mobilizing the SPD. Who Voted for Hitler? -- 5. Living with Toleration. Prussia. Growing Doubts about Toleration. What Is to Be Done? Demoralization, Autumn 1931 -- 6. The Debate over a Crisis Program. Down with Reparations? Confronting the Economic Crisis -- 7. The Iron Front. The Impact of the Iron Front. The SA Ban and Bruning's Fall. The July Reichstag Campaign. The Destruction of the Prussian Bulwark -- 8. Into the Abyss. Pragmatism versus Principle. The Schleicher Interlude. In the Grip of the Enemy: Principle versus Opportunism.