Re-examining the Third Reich remains, even now, essential. Its lessons are too important to be deemed safely settled. But when Richard Evans argues that the task has “gained new urgency and importance” due to the emergence of “strongmen and would-be dictators” within the world’s democracies “since shortly after the beginning of the twenty-first century,” he risks trivializing past horrors by wielding them as a weapon in the current debate over populism. That’s unless he has Vladimir Putin in mind, which would make for a very different discussion…