|  The
      slave system developed two triangles (or circles) of trade.  Both had
      Africa and the Caribbean as their base, but their apex was in either Northern
      Europe or New England.
The trade in slaves was dangerous and brutal, but enormously
        profitable.  On a successful voyage owners could hope to make profits of up
        to 900% return on investment.Money made on the slave-sugar-Africa route (along with money
        from other sources) fueled education, science, and industry in Europe and the
        Northeast United States.abolit |