on the intelligence of modern Aborigines. They have an average IQ of 64, compare

…. on the intelligence of modern Aborigines. They have an average IQ of 64, compared to about 70 for Sub-Saharan Africans, 85 for African Americans and 100 for whites. An IQ of below 70, in Western countries, has you classified as mentally retarded. So, the average 18-year-old Aborigine has the mental age of 11. … In the UK, it has been found that 4% of whites and 10% of blacks have mental health problems—particularly schizophrenia in the case of blacks.” It has been estimated that this is true of over 50% of Aborigines.