"One provision of the international peace settlement must, however, be mentioned separately: the abolition of the international slave-trade. The reasons for this were both humanitarian and economic: slavery was horrifying, and extremely inefficient. Moreover, from the point of view of the British who were the chief international champions of this admirable movement among the powers, the economy of 1815–48 no longer rested, like that of the eighteenth century, on the sale of men and of sugar, but on that of cotton goods. The actual abolition of slavery came more slowly (except, of course, where the French Revolution had already swept it away)."