Background
Salvius was the son of a civil servant.
Salvius was the son of a civil servant.
Then he moved to Marburg where he studied medicine, and to Montpellier where he received a degree in law.
Salvius was next to Axel Oxenstierna one of Sweden"s most capable and influential diplomats of his time and correspondent of Hugo Grotius. In 1619 he was involved in the transition of Goteborg into a free port. Salvius was appointed baron and in diplomatic service since 1624.
He became involved in the military campaigns of Gustavus Adolphus.
In 1629, he attended the peace negotiations in Lübeck and wrote the "war manifesto". Gustavus Adolphus sent this propaganda to the emperor of the Holy Roman Empire in 1630?
Salvius resided in Hamburg from 1631 till 1634 as a general war commissioner in Lower Saxony but moved back to Sweden until 1636.
Foreign twelve years he was the only Swedish diplomat in Germany. Apart from his undoubted diplomatic skills, his greed was particularly pronounced.
From 1643 he was preparing the peace negotiations at Osnabrück, as a second man behind Johan Oxenstierna, as Christina wanted peace at any cost, and therefore sent her own delegate.
When it became clear Johan Oxenstierna was not capable to fulfill his task neither diplomatic nor mentally, Salvius managed to push through the view of Queen Christina. In 1648 Salvius considered it “a great miracle that we hear of revolts by the people against their rulers everywhere in the world, for example in France, England, Germany, Poland, Muscovy, and the Ottoman Empire,” and wondered “whether this can be explained by some general configuration of the stars in the sky.” In 1650 he went back to Stockholm.
