In all languages of the world there are words stupid and smart;. There are no definitions for them, but they do not need explanation either. In some company, it’s worth mentioning “that fool” in passing, and everyone already knows who he’s talking about. But measuring intelligence began relatively recently. The first to get down to business was Darwin's cousin, the founder of eugenics, psychologist and anthropologist Sir Francis Galton (1822-1911). Galton's fruitful thought was understood and began to be developed. The modern psychometric approach was developed in 1904 by the Frenchman Alfred Binet (1857-1911). Then the idea was picked up by psychologist Lewis Theremin (1877-1956) at Stanford University in the USA, where the now famous abbreviation IQ (intelligence quotient) originated. Today, the overseas superpower is literally obsessed with brain testing. They say that even when hiring a job as a janitor, you cannot avoid the test. American psychologists study children with particular zeal. They start with two-year-olds, and five-year-olds are directly given the final verdict, expressed in points. Live with him, even if you are a prophet. It is not subject to appeal.