Other countries also had a much larger proportion of the population off fighting and dying. UK casualties in ww2 were 0.94% of the 1939 population, France's wer

Other countries also had a much larger proportion of the population off fighting and dying. UK casualties in ww2 were 0.94% of the 1939 population, France's were about 1.44%, the USSR's were about 13.4% (of course the USSR was a wild outlier). The USA lost about 0.3% of its 1939 population, still an appallingly huge number, but smaller. Since the people who were off fighting were predominantly the healthy young men who worked in industry at the time the impact on industry was magnified. The US was able to focus a much greater proportion of its effort on making things.