this be a classic movie that dramatize the plight of a man who can not adjust to change take place in society and feel more and more alienated and which lead to violence . joe be a worker and and he be dissatisfied and angry and and all he be needs be a pretext to lash out and which be what the story be about . alone and joe be quiet while together with someone else and he become lethal . and what make the character of joe even more chilling be that he fully rationalize his violence so that to him it not only not bad and it necessary . for joe project his own violent tendency onto those who he consider the enemy and therefore considers himself to be in a war and and in this movie and the generation gap be portray a a war . but it be a war in joe mind only and because the enemy in this case be in his imagination . nobody want to fight joe and but joe feel he must defend himself . although this movie be release in 1970 and it message be a relevant now a it be then a society continue to undergo major change which lead to the kind of intense alienation that the movie effectively dramatize .