Special cadres of culture are trained to direct the cultural institutions. Their preparation extends beyond the realm of culture to Marxism-Leninism, however, and they are generally trained to enable them to become involved in all aspects of the life of the community. The various cultural institutions, while genuinely serving to expose the masses to culture, are also important instruments of political and social indoctrination. In practice, the principles of socialist realism require that literary and artistic works actively promote the goals of the Party and reflect Communist ideology. Besides generally being "a weapon for the education of the new man with the ideals of socialism and the principles of Communist morality," literature, drama, music, and art must inspire nationalism and allegiance to the Party and stimulate the people to work toward fulfillment of Party plans, whether they are in the economic or the social spheres. The criterion used to evaluate cultural works is the degree to which they further the goals of the Party and socialist development. In conjunction with the initiation of the Cultural Revolution, Enver Hoxha expounded upon the vital role of the various aspects of culture in a speech to the Fifth Congress of the Albanian Workers' Party in November 1966. The task set by the Party is that "literature and art should become a powerful weapon in the hands of the Party for the education of the working people in the spirit of socialism and communism; that literature and art should stand at the vanguard of the struggle for the education of a new generation ideologically and morally pure; that all artistic creation should be of a high ideological level and be permeated by both the Party's militant revolutionary spirit and a healthy national spirit." Such demands have been made of authors, artists, and musicians since the inception of the Albanian People's Republic. Since 1966, however, when the Cultural Revolution was initiated, the importance of culture has received greater emphasis and the demands for ideological purity of all creative works have increased. The Cultural Revolution was still in motion as of the early months of 1970. The dominant themes of Albanian culture under communism have concerned the history of Albania, the struggle of the Communist-led partisans during the War of National Liberation, and the transformation of the backward, superstitious society into one that is modern and governed by progressive, socialist principles. In the mid-1960s, however, the Party called upon writers and artists to go beyond these themes and to portray the contemporary struggles for the creation of socialism. Party guidance stipulates that it is not enough to describe the past struggles and achievements. The ongoing hardships faced by the peasants and workers must be reflected in artistic works. The heroes are to be workers, peasants, and engineers, as well as the partisans.