Question: Treaties between indigenous peoples and what other groups formed an important part of political discourse in the late 20th and early 21st century?
Sentence: In the case of indigenous Australians, unlike with the Māori of New Zealand, no treaty was ever entered into with the indigenous peoples entitling the Europeans to land ownership, under the doctrine of terra nullius (later overturned by Mabo v Queensland, establishing the concept of native title well after colonization was already a fait accompli).
Answer in sentence: no