The use of the term, "REAL slavery," and marking an arbitrary start date to the 1500's, is quite insulting and uninformed, scholastically, morally, and humanistically, when the institution of declared, "ownership," of other human beings, and forcing them into unskilled labour or other endeavours (including unsavoury ones) for the benefit of their, "owner and master," predates recorded history and has plagued every corner of the globe in numerous guises, forms, institutions, justifications, and names throughout human history. And it is ALL REAL slavery. And it is sill happening TODAY, in seedy pockets of the world.