In Allonsanfan, the director/brother team of Paolo Taviani and Vittorio Taviani weave a witty and occasionally melancholic tale of 19th century radicalism in Italy. Marcello Mastroianni stars as Fulvio, a middle-aged man swept up in a extremist political movement. The more he protests that he wants no part of politics, the deeper he becomes enmeshed in the Cause. This film might make an intriguing companion piece to the earlier Mastroianni film The Organizer (63), in which he portrays one of the very radical types that his character in Allonsanfan so zealously repudiates. The title refers to the phonetic spelling of "Alons enfants," the first two words of the French "Marseillaise".
~ Hal Erickson, All Movie Guide