Ultra-leftism
The term ultra-leftism has two overlapping uses. One usage is a generally pejorative term for certain types of positions on the far left that are seen as extreme or intransigent. The term is also used—pejoratively or not—to refer to a particular current of Marxist communism, which is closely related to council communism and left communism.
Ultra-left currents within left communism are often subject to criticisms from other factions of the left. The left communist organization International Communist Current refuses to work with leftist groups except other left communists or anarchists. Gilles Dauvé (also known as Jean Barrot), a left communist theorist, argues that all bourgeois regimes should be opposed, and that revolutionaries should not defend liberal democracy against fascism.
Ultra-left current in Marxism
The term ultra left is rarely used in English, in which people tend to speak broadly of left communism as a minor variant of traditional Marxism. The French equivalent, ultra-gauche, has a stronger currency, as it is a more positive term in that language and is used to define a movement that still exists today: a branch of left communism descending from theorists such as Amadeo Bordiga, Otto Rühle, Anton Pannekoek, Herman Gorter and Paul Mattick, and continuing with more recent writers, such as Jacques Camatte and Gilles Dauvé.