Remembered for his role in overturning the Australian legal policy of terra nullius, this political activist fought for indigenous Australians' land rights.
Before becoming an activist, he worked as a gardener at Queensland's James Cook University.
He was the posthumous recipient of the 1992 Australian Human Rights Medal.
His marriage to fellow activist Bonita Mabo resulted in a child named Gail.
He and poet Oodgeroo Noonuccal were both Aboriginal rights activists in Australia.