Herman Gorter was a Dutch poet and Council Communist theorist. He was a leading member of the Tachtigers, a highly influential group of Dutch writers who worked together in Amsterdam in the 1880s, centered on De Nieuwe Gids.

The Communist Workers' Party of Germany was an anti-parliamentarian and left communist party that was active in Germany during the Weimar Republic. It was founded in 1920 in Heidelberg as a split from the Communist Party of Germany (KPD). Originally the party remained a sympathising member of Communist International. In 1922, the KAPD split into two factions, both of whom kept the name, but are referred to as the KAPD Essen Faction and the KAPD Berlin Faction.