The historical types of practice up to now — developing analogously to various types of socio-economic formations — have been characteristic of socio-class antagonisms, within whose framework the process of emancipation and integration of Man has been proceeding. In these relations we hold this process of the development of individuals could proceed — in view to a certain type of historical-social practice — only within the boundaries of concrete contradictions, produced by social antagonisms. As an expression of irreconcillability but also of inevitability a new revolutionary force forms itself and the way of its existence — the proletariat and its revolutionary practice. In its quality it is a new historical type of practice, imanent to the development of socialism; it constitutes itself according to the dialectical principle of revolutionary collectivity as the principle of acting and thinking. Thus the question of Man acquires new dimensions and (practical possibilities of his all-round development.