Edit: I'm going to start copying entire essays from friendly publications to make sure they don't disappear. The Communist Party of Italy was founded on today of all days, the day that the King of France was martyred by Illuminist revolutionaries. Here is a very important essay by the inestimable Roberto de Mattei
[Rorate] The Italian Communist Party was founded at Livorno on January 21, 1921, as a result of a split in the Socialist Party. Its principal founders were Antonio Gramsci (1891-1937), Palmiro Togliatti (1893-1964) and Amedeo Bordiga (1889-1970) subsequently expelled and subjected to damnatio memoriae, according to the typical internal dialectic of every Communist Party.