A NEW YORK TIMES EDITORS' CHOICE In a series of poignant vignettes, a preeminent historian makes a compelling case for Machiavelli as an unjustly maligned figure with valuable political insights that resonate as strongly today as they did in his time. Whenever a tempestuous period in history begins, Machiavelli is summoned, because he is known as one for philosophizing in dark times. In fact, since his death...