The Communist Manifesto Manifesto" summarises Marx and Engels' theories concerning the nature of society and politics, that in their own words, "The history of all hitherto existing society is the history of class struggles". It also briefly features their ideas for how the capitalist society of the time would eventually be replaced by socialism. Near the end of the Manifesto, the authors call for "forcible overthrow of all existing social conditions", which served as the justification for all communist revolutions around the world. In 2013, "The Communist Manifesto" was registered to UNESCO's Memory of the World Programme with "Capital, Volume I". "The Communist
Center for Economic and Social Justice and series of approaches by which people can understand and practice the moral values, central principles and logic behind a free enterprise theory of economic and social justice.” Its approach is based on a synthesis of the social doctrine of Pope Pius XI as analyzed by CESJ co-founder the late Reverend William J. Ferree, S.M., Ph.D., detailed in The Act of Social Justice (1943) and Introduction to Social Justice (1948), and the economic justice principles developed by lawyer-economist Louis O. Kelso and Aristotelian philosopher Mortimer J. Adler in their two books, "The Capitalist Manifesto" (1958) and "The New Capitalists" (1961).