Dean Craig Brown, AO (born 5 April 1943) is a politician who served as the Premier of South Australia between 14 December 1993 and 28 November 1996, and also served as 10th Deputy Premier of South Australia between 22 October 2001 and 5 March 2002, representing the South Australian Division of the Liberal Party of Australia. He became premier when he led the party to a landslide win at the 1993 state election, and lost the office when he lost a leadership challenge to John Olsen in November 1996. Early life Prior to entering politics Brown was a research scientist. Brown holds a Bachelor of Rural Science, Diploma in Business Administration, and he earned a Master of Rural Science at the University of New England. Political career Dean Brown's political career was marked by his rivalry with John Olsen, the two representing the moderate and conservative wings of the South Australian Liberal Party respectively. He was first elected to the House of Assembly for the safe Liberal seat of Davenport in east Adelaide on 10 March 1973, and joined the Liberal Movement faction of the party. He served in the ministry of David Tonkin from 1979 to 1982. After Tonkin lost the 1982 election and retired from politics, Brown ran in the ensuing leadership contest, losing to Olsen. For the 1985 election, an electoral redistribution left both Brown and Stan Evans, the member for Fisher, vying for Liberal preselection in Davenport. In the ensuing factional battle (Evans is a member of the conservative wing), Brown won preselection, but Evans remained in the race as an "Independent Liberal." At the election, Brown suffered a swing of 30 percent on the primary vote and 24 percent on the two-party vote, enough to lose the seat to Evans. Dean Brown returned to politics in 1992. The Labor government of John Bannon was embarrassed by the losses of the State Bank of South Australia, but incumbent Opposition Leader Dale Baker was unable to capitalize. Baker resigned and called a spill for all leadership positions. It initially appeared that Olsen, who had been appointed to the Australian Senate after losing the 1989 state election, would return to his old post with little difficulty. The Liberal Party's conservative faction persuaded former Deputy Premier Roger Goldsworthy to resign his safe seat of Kavel and hand it to Olsen, and Baker intended to hand the leadership back to