"In the months after Donald Trump's election, Hannah Arendt's seminal work, The Origins of Totalitarianism crashed onto the Amazon bestseller lists. "Never has our future been more unpredictable," she had written in the preface to the first edition in 1951, "never have we depended so much on political forces that cannot be trusted to follow the rules of common sense and self-interest - forces that look like sheer insanity, if judged by the standards...