natural selectionist
/ˌnatʃ(ə)rəl sɪˈlɛkʃ(ə)nɪst/ /ˌnatʃ(ə)rəl sɪˈlɛkʃnɪst/Biology
noun
A supporter or advocate of the theory of natural selection.
Origin
Mid 19th century; earliest use found in The Catholic World. From natural + selectionist, after natural selection.