A fascinating relic of the turbulent cultural/political aura of the late 60s (taking in the class struggle as well) which, ironically, in view of its outdated and occasionally embarrassing conservative views, makes full use of the permissiveness that prevailed for a while in mainstream cinema and which came about as a direct result of the liberal attitude it purports to criticize! Norman Wexler's incisive Oscar-nominated script is superbly enacted by Peter Boyle (in a powerhouse performance) who manages to make his garrulous, down-to-earth yet hypocritical and opportunistic character (with a barely-disguised fascist streak which comes to the fore in the remarkable violent conclusion) likable, even admirable; indeed, he comes across uncannily like a flabbier version of the young Marlon Brando! Similar to other generation gap movies of its era like TAKING OFF (1971) and HARDCORE (1978) but also nihilistic vigilante films like DEATH WISH (1974) and TAXI DRIVER (1976) - interestingly enough, two of these also feature Boyle - JOE ultimately emerges as an engrossing and powerful drama which could have been a masterpiece if it had had a more experienced director at the helm...