People of the Revolution and the USSR
- Clara Zetkin Clara Zetkin Creator of International Women's Day, she set women's liberation at the heart of class struggle
- Ernst Friedrich Däumig Ernst Friedrich Däumig German socialist and a leading figure in the workers’ council movement.
- Julian Józefowicz Marchlewski Julian Marchlewski A Pole who passed through the German and Russian revolutions and tried to bring revolution home
- Karl Liebknecht Karl Liebknecht The lone vote against the war; the revolution's first martyr
- Wilhelm Pieck Wilhelm Pieck From the Spartacus League to GDR head of state, the sole founding member who lived the full arc of German communism
- Heinrich Brandler Heinrich Brandler KPD chairman who called off a revolution; co-founder of the International Right Opposition
- Eugen Leviné Eugen Leviné Communist who led the Bavarian Soviet Republic in 1919 and was shot after its fall
- Paul Levi Paul Levi From Rosa Luxemburg's lawyer to KPD leader, his 'anti-putschism' took on Comintern adventurism
- August Thalheimer August Thalheimer Main theorist of the KPD and Bonapartist analyst of fascism
- Ernst Thälmann Ernst Thälmann Hitler's personal prisoner, unbroken by eleven years in solitary
- Karl Korsch Karl Korsch Co-founder of Western Marxism, the German philosopher who challenged Marxist orthodoxy with Marxism and Philosophy
- Hugo Eberlein Hugo Eberlein German Communist who abstained on the Comintern’s founding at its first congress and was later shot in the Great Purge
- Ernst Reuter Ernst Reuter The social democrat who became the voice of divided Berlin
- Arkadi Maslow Аркадий Маслов The pianist-turned-revolutionary who drove the KPD's ultra-left turn, and became the anti-Stalinist left's perpetual dissident
- Hermann Matern Hermann Matern SED Politburo member and chairman of the Central Party Control Commission who stood by Ulbricht in 1953
- Walter Ulbricht Walter Ulbricht German communist leader who built the GDR and erected the Berlin Wall
- Ruth Fischer Ruth Fischer First woman to lead a major European communist party, and its sharpest anti-Stalinist apostate
- Fritz Selbmann Fritz Selbmann East German heavy-industry minister who faced the striking workers outside the House of Ministries on 16 June 1953
- Anton Ackermann Anton Ackermann German communist who drafted the KPD’s 1945 appeal and argued for a “special German road to socialism”
- Erich Honecker Erich Honecker The long-serving East German leader of the walled republic