Bordigism in the context of "Communist left"

Left communism, or the communist left, describes a range of positions held by the left wing of communism, which criticises the political ideas and practices held by Marxist–Leninists and social democrats. Left communists assert positions which they regard as more authentically Marxist than the views of Marxism–Leninism espoused by the Communist International after its Bolshevization by Joseph Stalin and during its second congress. There have been two primary currents of left communism since World War I, namely the Italian left and the Dutch–German left.

The Italian communist left tends to follow Bordigism (though a smaller Damenite current exists) and considers itself to be Leninist, but denounces Marxism–Leninism as a form of bourgeois opportunism materialized in the Soviet Union under Stalin. The Italian current of left communism was historically represented by the Italian Socialist Party and the Communist Party of Italy but today is embodied in the Internationalist Communist Party of Italy, International Communist Party, and the International Communist Current.

In Marxism, ultra-leftism encompasses a broad spectrum of revolutionary Marxist currents that are anti-Leninist in perspective. Ultra-leftism distinguishes itself from other left-wing currents through its rejection of electoralism, trade unionism, and national liberation. The term is sometimes used as a synonym of Italian left communism. "Ultra-left" is also commonly used as a pejorative by Marxist–Leninists and Trotskyists to refer to extreme or uncompromising Marxist sects.