Prominent Aboriginal Christians have included Pastor David Unaipon, the first Aboriginal author; Pastor Sir Douglas Nicholls, athlete, activist and former Governor of South Australia; Mum (Shirl) Smith, a celebrated Redfern community worker who, assisted by the Sisters of Charity, worked in the courts and organised prison visitations, medical and social assistance for Aborigines, and former Senator Aden Ridgeway, the first Chairman of the Aboriginal Catholic Ministry. The Uniting Aboriginal and Islander Christian Congress, associated with the Uniting Church in Australia, is an organisation developed and managed by Indigenous people to "provide spiritual, social and economic pathways for Australia's First People".