Friedrich Nietzsche was an unusual philosopher. He celebrated vitality, power, courage, and living dangerously. But his own life was marked by chronic illness, migraines, loneliness, poor eyesight, and eventual mental collapse. He wrote like a prophet of strength while inhabiting a body of weakness. Paradox plagued him even after his death. He had fiercely opposed conformity, nationalism, anti-Semitism, and blind obedience to any authority. Yet after his death, parts of his work w...