In 1690, one out of every nine families in Boston owned a slave. In New York City, in 1703, two out of every five families owned a slave. From Newport, Rhode Island to Buenos Aires, black slaves could be found in virtually every New World area colonized by Europeans.Black slaves arrived in the New World at least as early as 1502. Over the next three centuries, slave traders brought at least fifteen million Africans to the New World (another twenty percent or more Africans died during the march to the West African coast and an...