ABSTRACT
This theory occupies an important position in the treasure house of Marxist thought. In-depth investigation of this theory will help us correctly understand the destiny of socialism and strengthen the scientific belief that socialism will inevitably replace capitalism in the world. It needs to be explained particularly that, despite his belief that the socialist revolution can win first in one or several countries, Lenin agrees with Marx and Engels that socialism and communism are “world-historical causes” and the proletariat of one or several countries cannot achieve the full and ultimate victory of socialism. This task can only be accomplished through the joint efforts of the proletariat of the whole world. Marx and Engels, believed that socialism and communism were “world-historical causes” whose ultimate victory must be a common victory around the whole world.
