historyThe Public Domain Review1550s · Venice, Italy

A Venetian nobleman's diet book became a long-lived bestseller that Nietzsche blamed for shortening lives

the gist

Alvise Cornaro was a Venetian nobleman who, at forty, was exhausted by decades of heavy eating and drinking. A doctor told him he must choose a regimen or face death, and he chose a temperate, orderly life centred on small portions of simple food. In the 1550s, in his later years, he wrote a guide to living long and well, which was translated into English in 1702 as Sure and Certain Methods of Attaining a Long and Healthful Life. He claimed to have lived to around ninety-eight, and the book was reprinted many times. Cornaro's recommendations included bread soup, eggs, veal and moderate wine, and he advised adding ice to wine and going dry in summer months. Joseph Addison admired the book in 1711. Friedrich Nietzsche, in Twilight of the Idols in 1888, argued that Cornaro had mistaken effect for cause, since his slow metabolism had made him sick in the first place and dictated his diet.

so what

Cornaro's book is an early example of the self-help longevity genre that still sells today, with its promises of extra years through disciplined eating. Nietzsche's critique is a sharp reminder that correlation between diet and a long life is hard to untangle from who a person already is.

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