Ingvar Carlsson is a Swedish politician who served as the Prime Minister of Sweden from 1986 to 1991. He was a member of the Social Democratic Party and took office after the assassination of Olof Palme, the previous Prime Minister. Carlsson focused on social welfare policies and economic reforms during his tenure. After stepping down as Prime Minister, Carlsson continued to influence Swedish politics and served as the leader of the Social Democratic Party until 1992. He played a significant role in shaping Sweden's modern welfare state and was known for his commitment to social justice and equality.