Italian anarchism as a movement began primarily from the influence of Mikhail Bakunin, Giuseppe Fanelli, and Errico Malatesta. Rooted in collectivist anarchism and social or socialist anarchism, it expanded to include illegalist individualist anarchism, mutualism, anarcho-syndicalism, and especially anarcho-communism. In fact, anarcho-communism first fully formed into its modern strain within the Italian section of the First International. Italian anarchism and Italian anarchists participated in the biennio rosso and survived Italian Fascism, with Italian anarchists significantly contributing to the Italian Resistance Movement. Platformism and insurrectionary anarchism were particularly common in Italian anarchism and continue to influence the movement today. The synthesist Italian Anarchist Federation appeared after the war, and autonomismo and operaismo especially influenced Italian anarchism in the second half of the 20th century.

Mikhail Alexandrovich Bakunin was a Russian revolutionary anarchist. He is among the most influential figures of anarchism and a major figure in the revolutionary socialist, social anarchist, and collectivist anarchist traditions. Bakunin's prestige as a revolutionary also made him one of the most famous ideologues in Europe, gaining substantial influence among radicals throughout Russia and Europe.