1690 British philosopher John Locke proposes that the mind of every child is a tabula rasa, or blank slate, and hence we are all born equal.
1859 Biologist Charles Darwin suggests that all human development is the result of adaptation to the environment.
1890 William James claims that people have genetically inherited individual tendencies, or “instincts.”
1925 Behaviorist John B. Watson says there is “no such thing as inheritance of capacity, talent, temperament, or mental constitution.”
1940s Nazi Germany seeks to create a “master Aryan race” through eugenics.
Francis Galton counted many gifted individuals ...