
Extract the answer to the question from the following context.
Question: Had some events of the early 20th century not occured, what would have been the notable difference in population for the nation of Russia?
Context: The first half of the 20th century in Russia and the Soviet Union was marked by a succession of wars, famines and other disasters, each accompanied by large-scale population losses. Stephen J. Lee estimates that, by the end of World War II in 1945, the Russian population was about 90 million fewer than it could have been otherwise.

90 million
