Ninety Years of the Communist Manifesto: Leon Trotsky-1937

the payment for labour power as equivalent to the cost of its reproduction; the appropriation of surplus value by the capitalists; competition as the basic law of social relations; the ruination of intermediate classes, i.e., the urban petty bourgeoisie and the peasantry; the concentration of wealth in the hands of an ever-diminishing number of property owners, at the one pole, and the numerical growth of the proletariat, at the other; the preparation of the material and political preconditions for the socialist regime.