other circles were strongly influenced by the developing movement of the Prague Spring. In March 1968, student demonstrations at the University of Warsaw broke out in the wake of the government's ban on further performance of the play Dziady by Adam Mickiewicz (written in 1824) at the National Theatre in Warsaw, because of its alleged "anti-Soviet references". Subsequently, the ORMO and other security formations attacked protesting university students in several major cities. In what became known as the March 1968 events, Moczar used the prior spontaneous and informal celebrations of the outcome of the Arab–Israeli Six-Day War of 1967 and now the Warsaw theatre affair as pretexts to launch an anti-intellectual and anti-Semitic (officially designated as "anti-Zionist") press campaign, whose real goal was to weaken the pro-reform liberal party faction and attack other circles. Thousands of generally secular and integrated people of Jewish origin lost their employment and some 15,000 Jews emigrated between 1967 and 1971. Of what used to be the prewar Europe's largest Jewish community, only several thousand people remained in Poland. Other victims were college students, many of whom were expelled from their institutions and had their careers destroyed, academic teachers who tried to defend the students and the academic institutions themselves: Warsaw University had several departments administratively dissolved. Liberal intelligentsia members, Jewish or not, were removed from the government and other places of employment. Leftist intellectuals and student leaders lost what was left of their faith in the ostensibly socialist government. Finally the party itself was purged of many thousand suspect members, people who somehow did not fit the new environment of intolerance and hatred. The 1968 purges meant also the beginning of a large scale generational replacement of the party executive membership, a process that continued into the early 1970s, after Gomułka's departure. The prewar communist cadres were removed and people whose careers were formed in People's Poland took their place, which gave Gomułka's successor Edward Gierek one of the youngest in Europe elites of power early in his term. The revisionist dissident prominence in the 1968 events overshadowed the equally significant awakening taking place among the working class of Poland. Gdańsk, where thousands of students and workers fought the police on March 15, had the highest in the country rate of administrative detentions and court cases. The greatest proportion of people arrested and imprisoned in March and April 1968 in Poland were classified by