The very fundamental definition goes as "Communism is the doctrine of the conditions of the liberation of the proletariat" (Frederick Engels). In the work THE HISTORICAL DESTINY OF THE DOCTRINE OF KARL MARX, V. I. Lenin put forwarded the question, "The chief thing in the doctrine of Marx is that it brings out the historic role of the proletariat as the builder of socialist society. Has the course of events all over the world confirmed this doctrine since it was expounded by Marx?" This question throws ample light over the fact that a crucial contemplation is indispensable.