DEGENERATIONIST
Etymology
Noun
degenerationist (plural degenerationists)
(biology, historical) One who believes in the theory of degenerationism.
The degenerationists hold that savagery is the result of degeneration from a superior state.
Source: Wiktionary
De*gen`er*a"tion*ist, n. (Biol.)
Definition: A believer in the theory of degeneration, or hereditary
degradation of type; as, the degenerationists hold that savagery is
the result of degeneration from a superior state.
Source: Webster’s Unabridged Dictionary 1913 Edition