"Instead of embarrassing commerce under piles of regulating laws, duties, and prohibitions, could it be relieved from all its shackles in all parts of the world, could every country be employed in producing that which nature has best fitted it to produce, and each be free to exchange with others mutual surplusses for mutual wants, the greatest mass possible would then be produced of those things which contribute to human life and human happiness; the numbers of mankind would be increased, and their condition bettered."(Emphasis added by Double Birds)
Jefferson quote source: Report on the Privileges and Restrictions on the Commerce of the United States in Foreign Countries. December 16, 1793