Murray Island was one of the thousands of locations in Australia that were claimed under the colonial doctrine “Terra Nullius,” in which ”no one lived in or claimed” Australia, free land to be colonized. Mabo in 1992 contested the Queensland state government's ownership of the island. Mabo’s aims are centered primarily on the recognition of land rights for indigenous peoples in Australia. The Terra Nullius doctrine in particular as a legal principle was deemed unfair, and he sought to overturn this doctrine and have the high court recognize native title, which they did in 1992, acknowledging the rights of Indigenous peoples to their traditional lands. Mabo and his legal team, led by Ron Castan, used various methods to challenge Terra Nullius. Moreover, in Mabo’s case, a test case of the feasibility of Terra nullius, Mabo was assigned as the plaintiff in order to argue the point of traditional land ownership as the original custodians of the island. The Mabos team used evidence such as anthropological information to disprove colonizers were the first ones on the island, such as oral histories, cultural practices, and traditional land management systems. Ron Castan employed the United Nations Declaration of Indigenous Peoples Rights in addition to anthropology, as well as legal advocacy on the legality of a basis on Terra Nullius, arguing how unjustly disregarded Indigenous peoples were treated due to this doctrine. Shortly after the ruling of the high court, the decision was made to overturn Terra Nullius as the legal justification for colonization. Aboriginal Australians who were able to demonstrate continuous connection to the land, according to traditions and customs, have legal rights to said land, according to the establishment of