derivationist

derivationist

(ˌdɛrɪˈveɪʃənɪst)
n
a person who believes that it is possible to derive knowledge of what is good for humans from a metaphysical study of humans themselvesa person who believes that the form of government appropriate in a state is derivable through logical reasoning, based on its necessary functions within its social contexta person who believes in the derivation of organic species; evolutionist
adj
of or relating to derivationists or their theories