In its modern form, the Māori protest movement emerged in the early 1970s as part of a broader Māori renaissance and has focused on issues such as the redressing Treaty of Waitangi grievances, Māori land-rights, the Māori language, culture, and racism. It has generally allied with the left wing, although it differs from the mainstream left in a number of ways. Most members of the movement have been Māori but it has attracted some support from (non-Māori) New Zealanders and internationally, particularly from other indigenous peoples. Notable successes of the movement include establishment of the Waitangi Tribunal in 1975, the return of some Māori land, and the Māori language becoming an official language of New Zealand in 1987.