“As a basketball fan, I had some idea who the stars of the NBA were, going back to its inception,” says Jackson, who serves as the John O. Whiteman Dean’s Distinguished Professor in the English department of Arizona State University. “But there is a difference between an NBA star and the NBA star that is also fashionable. And this book is a great representation of where NBA players have ascended, and how the most fashionable and best stars in basketball have as much influence in the fashion world as anyone else.”

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It proved a challenge to source a lot of earlier photos, says Jackson, especially of star players off the court – unlike in today’s everything-is-for-public consumption arena, where every MVP’s fashion choice is scrutinised, challenged, acclaimed and imitated.

“Before the 1970s, there weren’t a lot of photos of those star players,” he says. “Just because someone was a favourite player didn’t mean they deserved to be in the book, because they weren’t fashionable.”

Ultimately, Fly is also an engaging and lively look at contemporary American history, covering the World War II mandates that forced rigorous clothing choices on everyone as clothing production went into overdrive to make millions of military uniforms. Trousers had to be a particular length, jackets were single-breasted and could not have cuffs or pocket flaps. It was considered an act of patriotism to wear mismatched suits.

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“I had to educate myself on these historical facts, understanding how conservation mandates shaped what people could and couldn’t wear, how old your shoes were, how much rubber was in them – it was all mandated by the government.”

He says the research was easier once he got into the 1990s, a time in which he watched basketball, and followed the players and their fashion choices.

“I could recall Jordan and what he wore, Vince Carter, Allen Iverson,” he says. “And I had to figure out – if I’m defining a moment by a player like Iverson, then what is influencing him? Each of the chapters is a hypothesis that I bear out in the work.”

Segmenting the book into eras like he did also drove home the fact – long something he knew – that fashion is always shaped by larger forces.

“Whatever the rules and restrictions of the times are, the mores – ultimately that’s what decides what is and isn’t acceptable,” he says. “The average person is looking at their closet and making choices – and they are to a certain degree. But someone else has made the choice about what’s in their closet, about what you can buy, and what you can afford. That’s a decision of someone else. That’s economics.

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“What is happening politically, culturally and socially dictates the choices people make. Those choices aren’t happening in a vacuum.”

Jackson also shows in the book that the world’s biggest basketball stars aren’t necessarily fashion stars as well: P.J. Tucker of the Philadelphia 76ers may not yet have major celebrity status, but Jackson says he’s one of the most stylish men in the league.

“He’s front row at fashion shows, is featured in GQ, so even if he is a role player in the NBA, he’s a star in the fashion world.”

Ultimately, says Jackson, basketball stars are considered well dressed in the same way as anybody else.

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“You can see a person and know that they know what they are doing. You might not agree, but you are looking at them and going, ‘That’s not by accident, that takes knowledge.’ A less fashionable person will get blown along by the wind. But a really fashionable one looks comfortable in what they are wearing.”