The socialist revolution in Yugoslavia, being created in the conditions of World War II and the People's War of Liberation, enriched the Marxist theory of revolution, which constitutes a historical service of the Yugoslav Communist Party. The People's War of Liberation and the socialist revolution affirmed the Marxist ethic and revolutionary mora.ls and enriched them with new moral values. In the People's War of Liberation and in the socialist revolution all the basic issues of Marxist ethics were presented: the relationship between social beings and moral consciousness, social-economic and moral phenomena, freedom and necessity, common and personal ideals, personalities and collectives, ends and means in morality and many others. In addition, issues of moral judgments and moral sanctions, and relationships, between legal, religious, and political and moral norms were considered. With regard to all of these questions there exist rich moral funds, which with actual examples of real values give concreteness to values and a scientific basis to facts. The sources also make possible an ethic of the revolution based on rich factual materials. The Yugoslav Communist Party with its revolutionary practice, transformed individual values in one part of Yugoslavia, and made common values of the people and nationalities in our country. The sources relating to the People's War of Liberation and the revolution indicate that revolutionary humanism was universally manifested, that conditions of dehumanization in the individual and society were successfully overcome, and that from the conflagration of war man was saved. These are values which enrich Marxist humanism. The Communist Party of Yugoslavia, the Union of Communist Youth in Yugoslavia, and other revolutionary organizations demonstrated great concern for the development of proletarian morality and humanism in the class struggle between the two world wars and during the People's War of Liberation and in the socialist revolution. Basic moral values resulted from their activities, and we ascertain this from the sources which relate to the People's War of Liberation and the socialist revolution. Carrier of these new moral values was the working class with its levels of workers and revolutionary intelligentsia, and it represented them in the name of the whole society. As a progressive class it inherited the moral progressive values which it further enriched and developed. The sources demonstrate that in all the period, of class and liberation struggles, concern was shown for proletarian morality and humanism, which became the material strength behind the revolutionary transformation of the Yugoslav bourgeois to a new socialist society. The sources deal with general moral values: man as the highest moral value, freedom, proletarian solidarity and internationalism, brotherhood and unity, revolutionary Yugoslav patriotism, equality and equal rights, and others, as well as with personal values such as: revolutionary persuasion, humanity, courage, trust, comrade-ship, discipline, responsibility, self-initiative and many others. The sources are divided into periods of class, revolutionary, and liberation struggles: those between the two world wars and the sources from the People's War of Liberation and the socialist revolution. Important sources for the revolutionary ethic include: Pany documents, documents concerning the Union of Communist Youth in Yugoslavia and the United Federation of Antifascist Youth in Yugoslavia, military orders, materials concerning the activities of the revolutionary government, newspapers, brochures, and other publications. Besides these significant sources, other, arising after the war and dealing with the People's War of Liberation and the revolution are: memoir materials, chronicles, biographies of revolutionaries, scholarly works, articles read at scholarly meetings concerning the People', War and the revolution, magazines, films, literary works and others. It is necessary to consult enemy sources as well, which speak indirectly about the moral, of the revolutionary fighters and the behavior of the people. A constantly critical attitude with regard to the sources and scientific verification are demanded, so that subjectivism and simplification are avoided-taking individual examples as being typical and on that basis reaching conclusions and making evaluations. Hence the sources must be approached from the standard of historical and philosophical science and with scholarly responsibility without which there is no foundation for the ethics of the People's War of Liberation and the socialist revolution on the basis of Marxism. Thus, the sources make possible research and creation of ethics of the revolution. Until now, results have begun to appear in this area, but the demands of contemporary movements in the Yugoslav socialist revolution seek more diversified and responsible work in the creation of an ethic of socialist self-management.