During the years following World War I, two extremist ideological currents conquered the minds of European youth: fascist nationalism and communist Marxism. The former promised the peoples glory and conquests, at the price of developing xenophobia. Thus was fanned the fire of anti-Semitism, which led to rates of cruelty of unbelievable proportions. On the other hand, Marxism tended to the creation of a world without social divisions, at the price of the elimination of the non-productive classes. The Jews felt threatened both as individuals (by the possible disappearance of their means of subsistence) and as a national collective (by the possibility of total assimilation). When these doctrines found expression within some currents of the Jewish youth of the time, a handful of young intellectuals eager for reform adopted critical attitudes towards extremist precepts and slogans, coming to the conclusion that they were positions that did not deserve to be concretized in reality.