There is a sad history in Australia of treating the indigenous population as nothing more than a bunch of savages. This had its origins as a kind of reality distortion to justify taking their land and in some cases, exterminating them entirely as happened in Tasmania. There is still this perverse incentive today, since acknowledging that there was a full blown civilisation with a very long history present before English colonisation means we are a morally bankrupt nation, and also invites discussion of reparations.