 He wrote many historical works associated with the protochronism nationalist movement in Romanian history, which was later promoted by Nicolae Ceauşescu's regime.Despite being a sympathiser of the Iron Guard, Drăgan became a semi-official collaborator of Ceaușescu and the Communist regime, and as a result, he had access to some documents never published before on Ion Antonescu, using them in a four volume-book which put him in a good light.According to historian Lucian Boia, Drăgan promoted an extreme version of protochronism, which claimed that the Romania was the cradle of civilization, and the Romanian people the oldest in Europe