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. R7qhBadQqpYVmDBr/s6Dv/H/edJfomg136zh9OdCOz0bUeYHB3unbLkL+BvHvxww