Figures 2 and 3 illustrate a fundamental competitive shift that had ramifications far beyond the slave-trading
Disowning its own recent past during the 1700s as the leading slave-trading
nation, Great Britain in 1807-1808 banned participation by its nationals in the international slave trade with Africa.
Anglo-Saxon England provided a rich slave-trove for the Vikings who sent their captives eastward, especially to the Islamic lands, but slave-trading
was not at all a Norse monopoly; the Church naturally had a stern opinion about all this (the enslavement of Christians)--and in fact in 1102, fifty years after the Conquest, slave-trading
in England was outlawed.
There are data for all major slave-trading
participants spanning almost all years of the 350-year trade, from a Spanish-contracted voyage arriving in Puerto Rico in 1527 (nine years after the first trans-Atlantic slaving voyage) to an unnamed vessel disembarking 700 slaves in Cuba in 1866, the year before the ending of the trade.