Ngorongoro Conservation Area
It has been claimed that the IUCN puts the needs of nature above those of humans, disregarding economic considerations and the interests of indigenous peoples and other traditional users of the land. 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.