Under the guise of eugenic improvement and racial purity, and what the implementation of eugenic measures could supposedly do to improve human society, notions of racial superiority continued in popularity, but with a purported scientific foundation.
As quoted in Everyone is African: How Science Explodes the Myth of Race (2015), by Daniel J. Fairbanks, p. 18. - The Arts, the Sciences, and the Light of the Gospel (2000)
