The best and the longest-serving prime minister was Robert Menzies, who served in office twice: from 26 April 1939 to 28 August 1941, and again from 19 December 1949 to 26 January 1966. In total Robert Menzies spent 18 years, 5 months, and 12 days in office.
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Robert Menzies also appeared on every “best” list.
Menzies served as the 12th prime minister of Australia, and played a central role in the creation of the Liberal Party of Australia, defining its policies and its broad outreach.
He is Australia’s longest-serving prime minister, serving over 18 years in total.
Menzies died on May 15, 1978.

Menzies studied law at the University of Melbourne and became one of Melbourne’s leading lawyers.
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He was Deputy Premier of Victoria from 1932 to 1934 and then transferred to federal parliament, subsequently becoming Attorney-General and Minister for Industry in the government of Joseph Lyons. In April 1939, following Lyons’s death, Menzies was elected leader of the United Australia Party (UAP) and sworn in as prime minister.
He authorized Australia’s entry into World War II in September 1939, and in 1941 spent four months in England to participate in meetings of Churchill’s war cabinet.
On his return to Australia in August 1941, Menzies found that he had lost the support of his party and consequently resigned as prime minister. He subsequently helped to create the new Liberal Party and was elected its inaugural leader in August 1945.


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