The NF claimed that most non-white racial groups were genetically inferior to "Caucasoids and Mongoloids". It claimed that whites are inherently superior to blacks, with the latter contributing nothing to humanity. In the mid-1970s, Tyndall used "Spearhead" to claim that "the negro has a smaller brain and a much less complex cerebral structure" than white Europeans; in the early 1980s, "Nationalism Today" carried articles maintaining that black Africans had lower average IQs than white Europeans and thus were unfit "to go to white schools" or "live in white society". In depicting black people, the NF promoted what Billig characterised as "an image of savagery and primitiveness"; its published material presented black people as dirty and unhygienic, infected with disease, and incapable of governing themselves. "Spearhead" featured references to black people being cannibals, and at least one article claimed they ate dirt and faeces.