In 1992, Vogue was, as it is today, the global fashion authority, and Anna Wintour was its already-famous leader. But an upset—to this day, the only one of Wintour’s reign— was in the offing. Just a few days into the New Year, Hearst announced they were reviving the long-comatose Harper’s Bazaar, which was once Vogue’s greatest rival. And they were bringing in Liz Tilberis, the warm white-haired size-twelve editor of British Vogue—and Anna Wintour’s former second in command—to lead the charge...