The best predictor of social, financial, and educational outcomes that we have. No wonder the leftists waged an enormous war on IQ research since it began enlightening people about race and sex disparities, which demolished their egalitarian fantasies.
I am grateful for and indebted to Francis Galton, the cousin of Charles Darwin who pioneered intelligence research, opening the field to other scientists like Charles Spearman, who noticed a general cognitive ability underlining virtually everything that relates to intelligence; the g factor. I would also like to thank Alfred Binet for devising IQ tests in the early twentieth century and the people who improved them in order to advance our understanding of the human condition.
Antis be damned, IQ is a very reliable measure of intelligence and the most studied phenomenon in psychology.