This video was very interesting, enjoyable and truthful. I have added it to http://www.textbooksfree.org/Quick%20Notes%20History.htm. Slave trade has been around a long time. It replaced the practice of killing or eating those who lost in battle. Weren't most American slaves or their ancestors first enslaved by Africans who lost in battle to other Africans?
'Cambridge University Library is pleased to present the first items in its Foundations of Science collection: a selection from the Papers of Sir Isaac Newton. '