The cynical sign at the entrance to Auschwitz “Arbeit Macht Frei”: Work liberates. Profit from people forced to work by the Nazis. That, says journalist David de Jong, is what Germany’s richest industrial dynasties did. They collaborated with the Third Reich and although the companies that benefited the most from expropriations and forced labor paid financial compensation, “they never assumed moral responsibility (…) nor did they have to recognize bad practices,” he says. This is what De Jong tells in his book Money and power in the Third Reichedited in Spanish by Principal, where he talks about “the hidden history”...