Sir Francis Galton, FRS FRAI, was an English Victorian era polymath: a statistician, sociologist, psychologist, anthropologist, tropical explorer, geographer, inventor, meteorologist, proto-geneticist, psychometrician and a proponent of social Darwinism, eugenics and scientific racism. He was knighted in 1909.
Galton produced over 340 papers and books. He also created the statistical concept of correlation and widely promoted regression toward the mean. He was the first to apply statistical methods to the study of human differences and inheritance of intelligence, and introduced the use of questionnaires and surveys for collecting data on human communities, which he needed for genealogical and biographical works and for his anthropometric studies. He was a pioneer of eugenics, coining the term itself in 1883, and also coined the phrase "nature versus nurture". His book Hereditary Genius was the first social scientific attempt to study genius and greatness.
As an investigator of the human mind, he founded psychometrics and differential psychology, as well as the lexical hypothesis of personality.