section_path: Early life
section_name: Early life
paragraph_text: Early life
  
  Stoltenberg was born 16 March 1959 in Oslo, into the Norwegian Stoltenberg family, the family name derived from Stoltenberg in Schleswig-Holstein where a German ancestor once lived. Jens's father, Thorvald Stoltenberg (1931–2018), was a Labour party politician and diplomat who was an ambassador, defence minister and foreign minister. His mother, Karin Stoltenberg (née Heiberg; 1931–2012), was a geneticist who was the state secretary in multiple governments during the 1980s. Marianne Heiberg, married to former foreign minister Johan Jørgen Holst, was his maternal aunt. Jens lived in SFR Yugoslavia from 1961 to 1964 while his father worked at the Norwegian embassy.
  
  Stoltenberg attended primary school at Oslo Waldorf School, and upper secondary school at Oslo Cathedral School. He served his mandatory military service with the Army's Infantry Training Centre at Evjemoen in Aust-Agder. After leaving the army, Stoltenberg enrolled at the University of Oslo, graduating in 1987 with the cand.oecon. degree in economics. The title of his thesis was Makroøkonomisk planlegging under usikkerhet. En empirisk analyse ("Macroeconomic planning under uncertainty. An empirical analysis ").
  
  Stoltenberg's first steps into politics came in his early teens, when he was influenced by his sister Camilla, who at the time was a member of the then Marxist–Leninist group Red Youth. Opposition to the Vietnam War was his triggering motivation. Following heavy bombing raids against the North Vietnamese port city of Hai Phong at the end of the Vietnam War, he participated in protest rallies targeting the United States Embassy in Oslo. On at least one occasion embassy windows were broken by stone-throwing protesters. Several of Stoltenberg's friends were arrested by the police after these events.