Brian Mulroney served as the 18th prime minister of Canada from 1984 to 1993. During his tenure, he made significant changes to the Canadian economy, including introducing the Goods and Services Tax (GST) and negotiating the North American Free Trade Agreement (NAFTA) with the United States and Mexico. Mulroney was also known for his strong stance against apartheid in South Africa and for his efforts to strengthen bilateral relations with the United States.