The True Story Behind Taylor Swift's 'The Last Great American Dynasty' Lyrics

According to the Washington Post, Harkness was a divorcée who married Standard Oil heir William Hale Harkness in 1947. After her husband died in 1954, she inherited the mansion and became known for throwing over-the-top parties. As a result, she was a target of harsh criticism from the gossip tabloids and people in her circle—something Swift can relate to.

On the track, Swift details Harkness's antics, which were confirmed by the New York Times, including how she "filled the pool with Champagne" and dyed her neighbor's pet "key lime green" all while having a "marvelous time ruining everything."

Swift also reflects on how the town perceived Harkness during this time, writing, "And they said, 'There goes the last great American dynasty. Who knows, if she never showed up, what could've been. There goes the maddest woman this town has ever seen. She had a marvelous time ruining everything.'"

Based on the lyrics for “The Last Great American Dynasty,” it seems that Swift feels a connection to Harkness. By the end of the song, she draws a parallel to herself by switching it to the first person. “Who knows, if I never showed up, what could've been,” she wrote. "There goes the loudest woman this town has ever seen. I had a marvelous time ruining everything."