 It was translated to numerous languages, including Hebrew and Japanese.In 1943, he embarked on his magnum opus, "A History of Russia", of which six volumes were eventually published, despite the death of his co-author, Professor Michael Karpovich, in 1959.Vernadsky took a novel approach to Russian history, presenting it as a continuous succession of empires, starting from the Scythian, Sarmatian, Gothic, and Hunnic; Vernadsky attempted to determine the laws of their expansion and collapse.