Where Galton failed, France’s Alfred Binet and Theodore Simon succeeded, when they developed an IQ test in 1905 that Stanford psychologist Lewis Terman revised and delivered to Americans in 1916. These “experimental” tests would show “enormously significant racial differences in general intelligence, differences which cannot be wiped out by any scheme of mental culture,” the eugenicist said in his 1916 book, The Measurement of Intelligence.
