Tage Fritjof Erlander was a Swedish politician and statesman who served as the prime minister of Sweden and leader of the Social Democratic Party from 1946 to 1969. Previously, he served as minister of education from 1945 to 1946, and was a member of the Riksdag from 1932 to 1973. During his premiership, Sweden developed into one of the world's most advanced welfare states, with the "Swedish Model" at the peak of its acclaim and notoriety. His uninterrupted tenure of 23 years as head of the government is the longest ever in Sweden and in any modern Western democracy.

Sven Olof Joachim Palme was a Swedish politician and statesman who served as Prime Minister of Sweden from 1969 to 1976 and 1982 to 1986. Palme led the Swedish Social Democratic Party from 1969 until his assassination in 1986.