Re-post: Average IQ of Countries+

The average IQ in the United States is usually set at 100. Groups within the US score different average IQ's, such as 115 for college grads or 85 for African-Americans. Similarly, average IQ varies from country to country, shown in the 2002 book IQ and the Wealth of Nations (sets Britain at 100):

From Intelligence and the Wealth and Poverty of Nations by Richard Lynn

Rank Country IQ estimate 1  Hong Kong 107 2  South Korea 106 3 ^  Japan 105 4  Taiwan 104 5  Singapore 103 6 *  Austria 102 6 ^  Germany 102 6 **  Italy 102 6 *  Netherlands 102 10  Sweden 101 10  Switzerland 101 12  Belgium 100 12 **  China 100 12  New Zealand 100 12 **  United Kingdom 100 16  Hungary 99 16  Poland 99 16 **  Spain 99 19  Australia 98 19  Denmark 98 19 *  France 98 19  Mongolia 98 19  Norway 98 19 *  United States 98 25  Canada 97 25  Czech Republic 97 25  Finland 97 28  Argentina 96 28 ^  Russia 96 28  Slovakia 96 28  Uruguay 96 32 ^  Portugal 95 32  Slovenia 95 34  Israel 94 34  Romania 94 36  Bulgaria 93 36  Ireland 93 36 *  Greece 93 39  Malaysia 92 40  Thailand 91 41  Croatia 90 41 ^  Peru 90 41 * *  Turkey 90

44  Colombia 89 44  Indonesia 89 44  Suriname 89 47  Brazil 87 47 * *  Iraq 87 47 ^  Mexico 87 47  Samoa 87 47  Tonga 87 52 *  Lebanon 86 52  Philippines 86 54  Cuba 85 54  Morocco 85 56  Fiji 84 56 *  Iran 84 56  Marshall Islands 84 56  Puerto Rico 84 60 **  Egypt 83 60  Saudi Arabia 83 60  United Arab Emirates 83 61 *  India 81 62  Ecuador 80 63  Guatemala 79 64  Barbados 78 64  Nepal 78 64  Qatar 78 67  Zambia 77 68  Congo 73 68  Uganda 73 70  Jamaica 72 70  Kenya 72 70  South Africa 72 70  Sudan 72 70  Tanzania 72 75  Ghana 71 76  Nigeria 67 77  Guinea 66 77 ^  Zimbabwe 66 79  Democratic Republic of the Congo 65 80  Sierra Leone 64 81  Ethiopia 63 82  Equatorial Guinea 59

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A Few Thoughts on IQ and the Wealth of Nations

 A clear example of how a bad environment can hurt IQ can be seen in the IQ scores for sub-Saharan African countries. They average only around 70. 

In contrast, African-Americans average about 85. It appears unlikely that African-Americans' white admixture can account for most of this 15-point gap because they are only around 17%-18% white on average, according to the latest genetic research. 

(Thus African-Americans white genes probably couldn't account for more than 3 points of the gap between African-Americans and African-Africans.) This suggests that the harshness of life in Africa might be cutting ten points or more off African IQ scores.