Bismarck, appointed chancellor and raised to prince, feared the death of his octogenarian kaiser Wilhelm: his heir, Fritz, who had distinguished himself in the war, was a liberal, influenced by his English wife Vicky. Bismarck hated both as obstacles to his plans. The strain of managing his incoherent invention was compulsive but draining even for the cynical, ingenious chancellor. Into his seventies, he could dictate memoranda for five hours while micromanaging his own multiple conspiracies. Yet the stress led to a spiralling psychosis of paranoia, gluttony and insomnia that almost killed him
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