"I think it will be a future of less and less importance in terms of who he is," author Jane Marguerite Tippett said in an interview.
Tippett compared the duke to his granduncle Edward VIII, who abdicated the throne to marry Wallis Simpson.
"Edward had been a Prince of Wales for 25 years, he had been a king emperor — the aura of that lasted most of his life, but even by the end of it he was, of course, a much less consequential figure than he was, say in 1938 or '39, when memories of him as the most important royal in the world were still very fresh," Tippett continued.
Tippett explained that Harry's professional trajectory could be short-lived.
The commentator later speculated that Harry's relevance stems from his proximity to the crown.
"The longer [Harry] is away from that institution, the less important he will be because he only has a position in relation to that," she continued.
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“A lot of really deep, fun, silly friendships. They experience something that normally people didn’t experience," the podcaster added. “Going away to school and waking up with your friends every day, then Christmases in a castle where every room is filled with your cousins."
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After the release of Spare and his various tell-all projects, Harry's relationship with the Windsors was greatly impacted. Due to their ongoing feud, Harry is expected to spend the holiday season in California with Meghan Markle and their kids instead of with the Windsors in the U.K.