He supported an alliance with Soviet Union and after the war he continued to work as historian in People's Republic of Poland and headed Western Institute that studied former Polish territories recovered from Germany and history of Polish-German relations.
He supported an alliance with Soviet Union and after the war he continued to work as historian in People's Republic of Poland. Wojciechowski was the co-initiator of the Polish "Western thought" ("myśl zachodnia") and headed Western Institute that studied former Polish territories recovered from Germany and history of Polish-German relations.