Granted a passport by Yugoslav authorities in 1959, Dedijer was allowed to leave the country with his family. From then on, he devoted himself to writing history and teaching. He taught at
University of Belgrade and served as visiting professor of history at universities in the United States: Michigan, Harvard, Stanford, Princeton, and Yale; and in Europe: Paris (
Sorbonne),
Manchester (England), and
Stockholm, Sweden. In 1978, he was admitted as a full member to the
Serbian Academy of Sciences and Arts. Dedijer is known for his book,
The Yugoslav Auschwitz and the Vatican: The Croatian Massacre of the Serbs During World War II, which was translated into several languages. He wrote about the violent repression and genocide committed by
Ustashe Catholics in Croatia against ethnicities and religions that they considered heretics. He estimated a total of 750,000 Orthodox Serbs; 60,000 Jews; and 26,000 Sinti and Roma were massacred by the
Ustashe. The preface of the 1992 book edition reads, :»...in Catholic Croatia, the 'Kingdom of God', everyone who did not belong to the Catholic faith - for the most part Orthodox Serbs - was compelled to convert to Catholicism. Those who refused - as well as many who had already converted - were murdered, usually after prolonged torture in which the order of the day was the cutting off of noses, ears, or other body parts, or poking out eyes. Children were cut out of the bodies of pregnant women and subsequently beheaded; people were chopped to pieces before the eyes of loved ones, who were even forced to catch the spurting blood in a bowl, etc., to list only a few horrors as examples. These atrocities assumed such an extent that even German Nazis, who were not exactly sensitive in such matters, protested. If this historical fact is little known where we are, another fact completely escapes our knowledge: the decisive involvement of the
Vatican in these massacres.« His history,
The Road to Sarajevo (1966), discusses the origins of
World War I. His book
Tito (1953), was translated into twenty languages. Dedijer donated all his income from that book ($530,000) to charities. Dedijer wrote two important accounts of Yugoslav
Partisan history:
Diary and
Tito, both of which have been published in
English. ==Human rights activity, later life and death==