OF THE CAUSES OF IMPROVEMENT IN THE PRODUCTIVE POWERS OF LABOUR, AND OF THE ORDER ACCORDING TO WHICH ITS PRODUCE IS NATURALLY DISTRIBUTED AMONG THE DIFFERENT RANKS OF THE PEOPLE. vi+OaXGNfa9xYE69DYgOEOy0joll8Lk2G7V6Anse2wKmBlik0LclTK+bRsEhSXOA