The Arditi del Popolo were ultimately unable to withstand the Fascist onslaught for several reasons, including the strong financial and material support the Fascists received from economic elites, the fact that much leftist infrastructure had already been smashed by the time the Arditi were formed, and the inability of the Left to cooperate for the destruction of their common enemy.
Inability of the left to unify and fight a common enemy seems to be a recurring issue.
