An analysis of the causes of economic crises, such as the present. Presentation of the theory that those measures which will restore profits will destroy also the possibility of plenty, and a definition of the capitalistic system as a system designed for industrializing the world, and unable to proceed beyond that. Contemporary capitalist economics is an impotent science. Then comes a discussion of Marx's theory of capitalist crisis and we reach again the dilemma of profits vs. plenty. Fallacies of other interpretations of the Marxian theory are revealed, as denying what Marx considered, that high wages were a specific for the precipitation of crises. We face an alternative of Barbarism or Communism. Strachey feels that our century will be ""the century of the transition to Communism, and not of the transition to Barbarism.