Virtually anything from the dawn of the 20th century is dark and violent by today's standards. Particularly a commodity associated with sub-Saharan Africa. This

Virtually anything from the dawn of the 20th century is dark and violent by today's standards. Particularly a commodity associated with sub-Saharan Africa. This Europe is the Heart of Darkness[1] setting, after all. Pre-World War Europe did not eff around, and would kill off your whole tribe as soon as look at you. Which would have some pretty serious follow-on effects, as it turned out.