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In page Women in Canadian politics:

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The number of women elected to the House reached double digits for the first time in the 1979 election, when 10 women were elected,[citation needed] and among those, Flora MacDonald. When Joe Clark became Prime Minister of Canada in 1979, MacDonald was appointed by him the first female Secretary of State for External Affairs in Canadian history, and one of the first female foreign ministers anywhere in the world.[5][6][7]