Something for your history studies from 1530 to 1780:
LiveLeak.com - White slaves. Muslim masters.:
"A new study suggests that a million or more European Christians were enslaved by Muslims in North Africa between 1530 and 1780 a far greater number than had ever been estimated before."
"'One of the things that both the public and many scholars have tended to take as given is that slavery was always racial in nature that only blacks have been slaves. But that is not true, Davis said. 'We cannot think of slavery as something that only white people did to black people.'
During the time period Davis studied, it was religion and ethnicity, as much as race, that determined who became slaves."