Henry George,
Progress and Poverty, Volumes I and II
“ It is true that greater industry and skill, greater prudence, and a higher intelligence, are, as a rule, found associated with a better material condition of the working classes; but that this is effect, not cause, is shown by the relation of the facts. Wherever the material condition of the laboring classes has been improved, improvement in their personal qualities has followed, and wherever their material condition has been depressed, deterioration in these qualities has been the result ”
