โ€œBetween 1938 and 1944, the number of people working in German war production fell from 39 to 29 millionโ€ฆAnd at exactly the same time [Hitler] was killing 6 million of the most intelligent, hard-working, well educated, and producitve people in the Reich, namely the Jews,โ€ Andrew Roberts, author of The Storm of War: A New History of the Second World War.