social Darwinism UK /ˌsəʊʃl̩ ˈdɑːwɪnɪz(ə)m/US /ˌsoʊʃ(ə)l ˈdɑɹwənˌɪzəm/ noun1 •The theory that the laws of evolution by natural selection also apply to social structures.Night City was like a deranged experiment in social Darwinism, designed by a bored researcher who kept one thumb permanently on the fast-forward button. — 1984