Delegates from the Lassallean ADAV and the Marxist-influenced SDAP met in Gotha to unify their organizations, creating the Sozialistische Arbeiterpartei Deutschlands (SAPD)—the direct predecessor of the SPD and a foundational step for organized German social democracy.
The unity congress adopted the Gotha Program, a compromise platform combining SDAP and ADAV traditions. It provided a shared ideological and tactical baseline for the new party and shaped internal debates for years (including Marx’s later-famous critique).
Bismarck’s government secured passage of the Law against the publicly dangerous endeavors of Social Democracy, banning socialist/social-democratic organizations, meetings, and publications while leaving elections formally intact—forcing party and labor organizing into semi-clandestine forms.
A major strike wave among miners in the Ruhr/Westphalian coalfields in 1889 highlighted the growing capacity for large-scale industrial action in Imperial Germany and strengthened momentum for union organization and social-democratic influence in heavy industry.
Following the Second International’s 1889 call for coordinated May Day action, German workers held demonstrations (often constrained by policing and legal pressure). The day became a recurring focal point for the labor movement’s demands—especially on working hours.
After the Anti-Socialist Law lapsed (September 1890), the party reorganized publicly at the Halle congress and adopted the name Sozialdemokratische Partei Deutschlands (SPD), marking a shift from outlawed survival to mass legal politics.
At a Berlin conference, free trade unions created the Generalkommission der Gewerkschaften Deutschlands as a coordinating umbrella body (with Carl Legien as a leading figure). This institutionalized national union coordination closely linked to, but organizationally distinct from, the SPD.
The SPD adopted the Erfurt Program, a new platform that more explicitly anchored the party in Marxist analysis while pairing long-term socialist aims with an extensive set of immediate reforms (labor protections, political rights, and social policy).
Nearly 17,000 dockworkers and related port workers joined a massive strike in Hamburg. Its scale tested union logistics, public solidarity, and employer/government responses; the strike’s ultimate defeat shaped later debates on strategy, organization, and repression.
After roughly eleven weeks, the Hamburg dockworkers’ strike ended without gains for the strikers. The outcome underscored employer resistance to collective bargaining and influenced subsequent labor-movement strategy and state attitudes toward social democracy.
Eduard Bernstein’s Die Voraussetzungen des Sozialismus und die Aufgaben der Sozialdemokratie (1899) crystallized the revisionist challenge to orthodox Marxism in the SPD, arguing for a reformist, parliamentary road—sparking a long-running strategic dispute within German social democracy.
At the SPD’s Mannheim party congress, the Mannheimer Abkommen clarified relations with the free trade unions, giving unions decisive authority over strike decisions and tightening cooperation. It institutionalized a division of labor between party politics and union industrial action.
In the federal election, the SPD won the most votes and became the largest parliamentary party in the Reichstag (110 seats), demonstrating social democracy’s mass electoral base despite Imperial Germany’s political constraints.
At the outbreak of World War I, the SPD Reichstag delegation voted as a bloc for war credits, helping establish the Burgfrieden (political truce) and marking a decisive rupture between anti-militarist tradition and wartime national unity policies.
Representatives of industrialists and unions concluded the Stinnes–Legien Agreement, recognizing unions for collective bargaining and supporting reforms including the eight-hour day and workplace councils—fulfilling long-standing labor movement demands as the Empire collapsed.
Social Democratic Party and the Organized Labor Movement (1875-1918)
