 Until the 1980s IUCN favored the "Yellowstone Model’ of conservation which called for the removal of humans from protected areas.The expulsion of the Maasai people from Serengeti National Park and the Ngorongoro Conservation Area is perhaps the best known example of this approach.This is linked to another criticism that has been directed at IUCN, namely that throughout its history it has mainly been ‘Northern focused’, i.e.