"The proletariat has been kept in ignorance and slavery by the propertied classes for centuries, so that they have had little time for intellectual training, particularly for their own thinking, people who, though physically tough, are above all very often loaded malnourished and with all sorts of worries, have little opportunity to think seriously about social problems. In most cases it is not innate stupidity and inertia of thought that makes workers dull and indifferent, as is so often claimed, but the lack of the necessary opportunity and leisure."