Eugenics
The study of how to arrange reproduction within a human population to increase the occurrence of heritable characteristics regarded as desirable.
Evolution
The gradual development of something, especially from a simple to a more complex form.
Euthanasia
An easy or painless death, or the intentional ending of the life of a person suffering from an incurable or painful disease at his or her request. Also called mercy killing.
NCI Dictionary of Cancer Terms
Racial Hygiene
The term racial hygiene was used to describe an approach to eugenics in the early 20th century. Most eugenicists at the time, racial hygienists believed that the lack of eugenics would lead to rapid social degeneration, the decline of civilization by the spread of inferior characteristics.