white supremacism

Noun

white supremacy (uncountable)

1. The ideology which holds that the white race is superior to all others.
   • Among Southern whites, the defence of slavery slid into a defence of white supremacy, since that was a useful way to unite the white population behind a coherent ideology; most Southerners did not actually own slaves, and had no necessary interest in defending that institution alone.2009, Diarmaid MacCulloch, A History of Christianity, Penguin, published 2010, page 909
2. A situation in which white people are privileged over other people in society.