alt Hacker NewsSignificant IQ differences DO exist across countries, with key factors being education, health & nutrition, socioeconomic status, environmental factors (more controversial), the Flynn effect.
Significant IQ differences DO exist across countries, with key factors being education, health & nutrition, socioeconomic status, environmental factors (more controversial), the Flynn effect.
Importantly: we have no way of knowing that, because there is no such thing as a country-by-country survey of mean or median IQ.