Australia is one of the largest countries of the world. Formerly under the British Empire, the country ended the British involvement in the government of Australia in 1986. Australia’s political system is a federal constitutional parliamentary democracy and a constitutional monarchy. The role of the head of the state of the country is divided between the monarch of Australia and the Governor General. The Prime Minister is vested with executive powers and is the highest government minister of the country. Commissioned by the Governor General of Australia, he holds the most powerful political office in Australia. Talking about political parties, the country has two major political groups that usually form the government both federally and in the states - the Australian Labor Party and the Coalition which comprises of the grouping of the Liberal Party and its minor partner, the National Party. Ever since the Constitution of Australia came into being, the country has had prominent political heads and leaders who have played a dominant role in the nation’s advancement and progress. And while talking about Australian leaders, one cannot but fail to mention the name of Sir Robert Menzies, the longest-serving Prime Minister whose contribution cannot be fathomed. Read on this section to get a list of Australian political leaders and their contribution to the country’s political, economic and social landscape through their biographies.