Ans.: It is the direct clash between two hostile class interests wherein the employing class makes every effort to appropriate more of the wealth produced by the working class, and the working class ever struggles to retain more of the wealth which it produces. The capitalist class strives to get more surplus value and the working class strives to get more wages. The class consciousness of those who live by working has found one of its best expressions in the following paragraphs: "The world stands upon the threshold of a new social order. The capitalist system of production and distribution is doomed; capitalist appropriation of labor's product forces the bulk of mankind into wage slavery, throws society into the convulsions of the class struggle, and momentarily threatens to engulf humanity in chaos and disaster. Since the advent of civilization human society has been divided into classes. Each new form of society has come into being with a definite purpose to fulfill in the progress of the human race. Each has been born, has grown, developed, prospered, become old, outworn, and, has finally been overthrown. Each society has developed within itself the germs of its own destruction as well as the germs which went to make up the society of the future. The capitalist system rose during the seventeenth, eighteenth and nineteenth centuries by the overthrow of feudalism. Its great and all-important mission in the development of man was to improve, develop, and concentrate the means of production and distribution, thus creating a system of co-operative production. This work was completed in advanced capitalist countries about the beginning of the 20th century. That moment capitalism had fulfilled its historic mission, and from that moment the capitalist class became a class of parasites. In the course of human progress mankind has passed (through class rule, private property, and individualism in production and exchange) from the enforced and inevitable want, misery, poverty, and ignorance of savagery and barbarism to the affluence and high productive capacity of civilization. For all practical purposes, co-operative production has now superseded individual production.