Joseph Philippe Pierre Yves Elliott Trudeau (October 18, 1919 – September 28, 2000) was a Canadian politician and lawyer who served as the 15th prime minister of Canada from 1968 to 1979 and again from 1980 to 1984. Between his non-consecutive terms as prime minister, he served as the leader of the Official Opposition from 1979 to 1980.
Trudeau was born and raised in Outremont, Quebec, and studied politics and law. In the 1950s, he rose to prominence as a labour activist in Quebec politics by opposing the conservative Union Nationale government. Trudeau was then an associate professor of law at the Université de Montréal. He was originally part of the social democratic New Democratic Party (NDP), but then joined the Liberal Party in 1965, believing that the NDP could not achieve power. That year, he was elected to the House of Commons, and was quickly appointed as prime minister Lester B. Pearson's parliamentary secretary. In 1967, Trudeau was appointed as minister of justice and attorney general, during which time he liberalized divorce and abortion laws and decriminalized homosexuality. Trudeau's outgoing personality and charisma caused a sensation, termed "Trudeaumania", which helped him win the leadership of the Liberal Party in 1968. He then succeeded Pearson and became prime minister of Canada.