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. zBvu8WOmvlbRT9jgugtypzIEhI0yRkIU8pg5gEZiNdArl/kLpIZaiFYwoO+kB5jg