The work of DeWitt, Deutsch, and others led the many-worlds interpretation to become much more popular over the ensuing decades. But Everett didn’t live to see the many-worlds interpretation achieve its current status as the most prominent rival to the Copenhagen interpretation. He died of a massive heart attack in 1982, at the age of 51.
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Everett used Many Worlds as an excuse to live a gluttonous life and disregard his health. He figure he’d always be alive in one of the worlds.
Of course! I wondered why he (probably) let himself go like that.