For all those who reject any 'actually existing socialism' or 'worker's state' (whether 'degenerated' or not) theories and recognise that USSR and its satellites, China, Cuba, North Korea and all the rest were and are state capitalist.
Anarchist, Left Communist, Marxian Socialist and Trotskyist theorists all welcome, or if anyone has any other variants bring them too.
In honour of being the first to use the term, have a picture of Wilhelm Liebknecht.