People of the Revolution and the USSR
- Franz Erdmann Mehring Franz Mehring The elder theoretician of German Marxism: historian, literary critic, and Spartacus League co-founder
- Clara Zetkin Clara Zetkin Creator of International Women's Day, she set women's liberation at the heart of class struggle
- Karl Liebknecht Karl Liebknecht The lone vote against the war; the revolution's first martyr
- Rosa Luxemburg Rosa Luxemburg “Freedom is always the freedom of the one who thinks differently”
- Heinrich Brandler Heinrich Brandler KPD chairman who called off a revolution; co-founder of the International Right Opposition
- 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
- 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
- Friedrich Ebert Jr. Friedrich Ebert junior A social democrat who moved from municipal politics into state power amid Germany's division