It is difficult to compare aggregates also because you should take into account population density. https://en.wikipedia.org/wiki/World_population#Past_populati

It is difficult to compare aggregates also because you should take into account population density. https://en.wikipedia.org/wiki/World_population#Past_population https://en.wikipedia.org/wiki/World_population#Past_populati.... trans-Atlantic slave trade was very huge (it had an impact on demography). Arab slave trade was already huge and has been lenghty. Both are terrible.