Duk Warsa 1906, kerdil Kongo Ota Benga kagenahang olih antropolog Amerika  Madison Grant ring tengah kandang ring kebun bintang Bronx,  kaicen bantang utawi label "mata rantai sane ical" inggih punika irengan (orang utan) miwah "ras kulit putih" — Grant, pinaka ahli eugenika sane sampun kaloktah, taler sang sane nyurat utawi penulis The Passing of the Great Race (1916).
In 1906, Congolese pygmy Ota Benga was put by American anthropologist Madison Grant in a cage in the Bronx Zoo, labelled "the missing link" between an orangutan and the "white race" — Grant, a renowned eugenicist, was also the author of The Passing of the Great Race (1916).