Chief theoretician of orthodox Marxism in the Second International, founding editor of Die Neue Zeit, editor of Marx's Capital Vol. IV
"Socialism as a means to the emancipation of the proletariat, without democracy, is unthinkable." — The Dictatorship of the Proletariat (1918)
Leading Marxist theoretician of the Second International. He authored the Erfurt Programme, refuted Bernstein's revisionism, and after the Russian Revolution critiqued Bolshevik rule, creating the defining point of divergence between social democracy and Leninism.
Career Timeline
- 1875Joined Austrian SDAP; published Darwin and Socialism
- 1880–1883Moved to Zurich, met Bernstein; travelled to London and befriended Marx and Engels
- 1883–1917Founded and edited Die Neue Zeit for 35 years — leading Marxist theoretical journal of the Second International
- 1885–1890Worked closely with Engels in London; began editing Marx's Theories of Surplus Value
- 1891–1892Authored theoretical section of Erfurt Programme and commentary The Class Struggle — defining SPD Marxism
- 1899–1909Led orthodox Marxist counter-attack against Bernstein's revisionism; published The Road to Power
- 1917Broke with SPD over war policy; co-founded Independent Social Democratic Party (USPD)
- 1918–1922Published The Dictatorship of the Proletariat criticising Bolshevik rule; provoked Lenin's polemical reply
Related historical events
The Bernstein Revisionism Debate — Defender of Orthodox Marxism
From 1896, Eduard Bernstein used the pages of Die Neue Zeit and his book The Preconditions of Socialism (1899) to attack Marx's theory of value, dialectics, and the collapse thesis, arguing instead for an ethical foundation of socialism and gradual reform. Kautsky mounted the most systematic theoretical counter-attack. His Bernstein und das sozialdemokratische Programm (1899) critiqued revisionism across three fronts: method, programme, and tactics. Kautsky showed that Bernstein confused dialectics with mechanical determinism and that his theory of capitalist adaptation concealed the deepening of class antagonisms. The first German edition sold 20,000 copies almost immediately and became the orthodox camp's core arsenal in the four-day debate opened by Bebel's six-hour report at the 1899 Hanover Party Congress. Lenin hailed it as "the most substantial work of anti-revisionist literature" and promoted its Russian translation. Kautsky's defence had limits: he tolerated Bernstein's continued party membership and was later criticised by Luxemburg and Lenin for "centrist passivity" on imperialism and the mass strike. Nevertheless, the revisionism debate was the defining theoretical moment of Second International Marxism and became the enduring reference point for the divide between social democracy and revolutionary socialism.