Amadeo I of Spain | Amadeo Roldán | Amadeo | Bordiga surface | Amadeo Carrizo |
Levi attended the Livorno congress of the Italian Socialist Party (PSI) which had joined the Comintern, where Levi had supported Giacinto Serrati against the faction around Antonio Gramsci and Amadeo Bordiga who went on to form the Italian Communist Party (PCI) supported by Comintern representatives Mátyás Rákosi and Khristo Kabakchiev.
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.