Darwinianism
/daːˈwɪnɪənɪz(ə)m/noun
1Imitation of the poetic style of Erasmus Darwin. rare. Now historical.
2The Darwinian theory of evolution by natural selection; = Darwinism. Also: an analogous theory of development through competition in other spheres; = Darwinism. In quot. 1883: a Darwinian idiom or phrase.
Origin
Early 19th century; earliest use found in The Edinburgh Review. From Darwinian + -ism.