Those very qualities which were rooted in this character structure—compulsion to work, passion for thrift, the readiness to make one’s life a tool for the purposes of an extra personal power, asceticism, and a compulsive sense of duty—were character traits which became productive forces in capitalistic society and without which modern economic and social development are unthinkable; they were the specific forms into which human energy was shaped and in which it became one of the productive forces within the social process.