Eugenics is a largely discredited set of beliefs and practices that aim to improve the genetic quality of a human population. Historically, eugenicists have attempted to alter the frequency of various
1930s exhibit by the Eugenics Society. Some of the signs read "Healthy and Unhealthy Families", "Heredity as the Basis of Efficiency", and "Marry Wisely".
Lester Frank Ward wrote the early paper: "Eugenics, Euthenics and Eudemics", making yet further distinctions.