ORIGINAL: Jim D Burns
It was a rough estimate, but probably close to accurate. We’d need a population census report for the era, but considering about half of China was conquered by Japan, I doubt 1/3rd would be far from the truth. Countries that were totally or partially conquered during the war:
France, Belgium, Holland, Denmark, Germany, Italy, Poland, Yugoslavia, Greece, Bulgaria, Hungary, Rumania, Finland, big chunk of Russia, North Africa, about half of China (includes Manchuria and Korea), Burma, Siam, Philippines, Dutch East Indies, and Japan.
Wikipedia reference says different - rough estimate of the world population as of 1940 was 2.3 billion. You're claiming that approximately 750 million people were conquered or otherwise changed hands? That's TEN TIMES the population of Germany at the beginning of the war.
If your "rough estimate" is 1/3 of the world - then back up your statement. Where's your evidence?
And get your facts straight - you're including "half of China" - which is wrong. The Sino-Japanese war was officially July 7, 1937 – September 9, 1945, whereas WWII "officially" started September 1, 1939. You're erroneously padding your numbers by including an extraneous conflict.