Walter Rodney said this quote
“ The truth is that any figure of Africans imported into the Americas which is narrowly based on the surviving records is bound to be low, because there were so many people at the time who had a vested interest in smuggling slaves (and withholding data. Nevertheless, if the low figure of ten million was accepted as basis for evaluating the impact of slaving on Africa as a whole, the conclusions that could legitimately be drawn would confound those who attempt to make light of the experience of the rape of Africans from 1445 to 1870. Pg. 96 ”