A new four-part documentary series by Ken Burns paints a sweeping portrait of a man whose life intersected with many of modern America’s most profound changes.One day in the mid-1990s, Ken Burns had a cold while he was in Los Angeles to raise money for his next documentary. He ducked into a coffee shop for some hot tea, and after paying, one of the 20th century’s most ardent historians turned from the counter and locked eyes with perhaps its most towering icon. Muhammad Ali was sitting in a booth nearby. The two men stared at each other silently for longer than most strangers would — celebrities or not.“There’s was almost no movement on both of us except that kind of opening, that love that happens when you just feel unashamed and unembarrassed by the persistent gaze,” Burns said recently. “This wordless conversation; I have the script in my head, I heard his voice in my mind. But it was just without going over and shaking hands, of course, not asking for an autograph or anything like that.”By that point, Ali was in the clutches of Parkinson’s disease — hence the silence from a man who for many decades couldn’t stop talking: about his own beauty and skill, about how ugly and untalented his opponents were, about the injustice Black people across America had faced for hundreds of years.Nearly three decades later, Burns; his oldest daughter, Sarah; and her husband, David McMahon, have stitched together a sweeping portrait of Ali’s impact from more than 40 years of footage and photographs. “Muhammad Ali,” a four-part documentary series that premieres Sept. 19 on PBS, follows the arc of a man whose life intersected with many of modern America’s most profound changes — and who was also not as widely revered in his prime as he is now.David Remnick, the editor of The New Yorker and author of “King of the World,” a 1998 biography of Ali, said “it was very clear that a lot of America found him dangerous, threatening to the way people were ‘supposed’ to behave — much less Black people.”“He won people over because he was right about the war,” Remnick continued. “He won people over because as an athlete, he proved himself over and over again to be not only beautiful to watch, but unbelievably courageous. So his athleticism and his superiority as an athlete couldn’t just couldn’t be denied, even when he lost.”In 1978, Ali beat Leon Spinks to win the heavyweight championship for the third time.Michael GaffneyThere has been no shortage of documentaries or biographies about Ali in the last few decades. For the filmmakers, the idea took root in 2014, when their friend Jonathan Eig was working on a book about Ali. (“Ali: A Life,” published in 2017.) Eig’s research led him to believe that a comprehensive film representation of Ali’s life had not been done before, and that the Burnses were the perfect team to do it.McMahon said it took only a few archival clips to convince them of the potential power of a wide-ranging Ali documentary. “There were so many possibilities to tie together all these threads that were kind of out there,” he said. “You’d see documentaries that had been about a single chapter in his life or a single fight, or books covering only a portion of his life.”The more the filmmakers dug into Ali’s life, Sarah Burns said, the more they realized “just how much there was to this story.”“Not just the boxing, obviously,” she said, “but his relationships with Malcolm X and Elijah Muhammad, his family life, his marriages, his draft resistance and his courage and being willing to go to jail for his convictions, and also his battle with Parkinson’s — you know, his later life, his post-boxing life.” That “really hadn’t,” she added, “been explored in as much detail.”The new series traces a path from the young Cassius Clay in Jim Crow-era Louisville to the complicated, at times self-contradictory adult who won the heavyweight title three times and faced down the U.S. government over his refusal to fight in Vietnam. The filmmakers show him as not only a dominant heavyweight during his peak fighting years but also a figure of no small impact on society. Here is “The Greatest” clowning with the Beatles; standing at a podium with Malcolm X; embracing the Rev. Dr. Martin Luther King Jr.; calling another Black fighter an “Uncle Tom” for refusing to acknowledge his name change, as a leering Howard Cosell tells the cameras to “keep shooting” the ensuing scuffle; and finally declaring publicly — at risk to his career and endorsements — that he was a Muslim.Ali had relationships with many other prominent 20th century figures, including Malcolm X.ZUMA Press, Inc./Alamy Live NewsAli’s rise to stardom coincided with a period of intense cultural change in the United States, and his connection to the Civil Rights and antiwar movements is critical in distinguishing Ali the man from Ali the boxer, McMahon said — and in recognizing his impact on American audiences.“You can’t understand his refusal to be inducted into the U.S. Army without understanding his faith, without understanding the meaning of Elijah Muhammad in his life,” he said, referring to the mercurial and sometimes caustic leader of the Nation of Islam, with whom Ali had a close relationship. “We hadn’t really seen that explained. There were also perspectives that hadn’t been heard; we thought, ‘Who out there could tell us more about his faith?’”Eig, the biographer, shared a huge trove of contacts with the filmmakers, and they started their initial interviews in 2016, a week after Ali died. Dozens of writers, friends and boxing ambassadors participated: Kareem Abdul-Jabbar, Larry Holmes, Jesse Jackson, the novelist Walter Mosley, the ESPN writer Howard Bryant, the boxing promoter Don King. Over the next several years, the filmmakers unearthed more than 15,000 photographs and dug up footage that had not been seen publicly. A production company that had shot the “Thrilla in Manila,” Ali’s third and final bout with Joe Frazier, in the Philippines, had folded before the film could be used. Their footage was buried in a Pennsylvania archive.“This woman pulled these boxes out and said, ‘They say “Ali” on them — I don’t know what they are,’” McMahon said. “This is Technicolor, it’s 16-millimeter, shot from the apron [of the ring] — it just pops. And you see the fight in ways that had never been seen before.”Ali’s relationship with Frazier, who as a young fighter had been one of Ali’s fans, is one of the thornier aspects of the documentary. Ali’s treatment of him before their fights was quite cruel, employing some of the language of “racist white people,” as one commentator in the series says, to denigrate Frazier (who never forgave him). It’s part of the complex picture of Ali that the series provides: a people’s champion who could be petty; a devout Muslim who was a serial philanderer; an idealist who made a lot of people angry with his refusal to conform to public expectations.Bryant, the ESPN writer, said he didn’t think “people understand why this story is so heroic and so important and so unique.”“We just seem to think that every person out there, if they protest something, if they say something, if they face some sort of sanction, we put them in the same category as Muhammad Ali or Jackie Robinson,” he continued. “And it’s just such nonsense.”“Name me another athlete where the full weight of the United States government came down on one person. I’m not talking about the N.F.L. saying you can’t play when you’re already a millionaire. Colin Kaepernick obviously sacrificed and lost some things. It’s not the same thing. It’s not even close.”For two of Ali’s daughters, Rasheda Ali (from his second marriage, to Khalilah Ali, born Belinda Boyd) and Hana Ali (from his third, to Veronica Porche), the new documentary is an honest look at the father they knew mainly while he was under the weight of Parkinson’s. The film opens with a shot of him sitting with his oldest child, Maryum, encouraging her to look out the window so he can steal a bite of her food. The footage brought Rasheda to tears.Belinda Boyd became Ali’s second wife and changed her name to Khalilah Ali. Thomas Hoepker/Magnum Photos“I’ve never seen the family footage — and even the photos!” Rasheda said. “I was like, ‘Wow, where did you get that?’”“He was always making jokes and he was fun,” she added. “That’s the Muhammad Ali people don’t really see regularly.”Hana, who said that anyone other than the Burns would have been making “just another documentary about my father,” also noted that the more intimate footage helped fill in some of the nuances about him.“It’s so hard when you live a life like my father’s, where you’re so accessible, and so photographed, and his story’s been told so many times,” Hana said. “Honestly, I’ve seen so many documentaries about our father, and even just watching the beginning of this one, already, it was just different — it felt more personable.”The series comes to a close as Ali has become, as Ken Burns described it, “the most beloved person on the planet.” The footage of his trembling surprise appearance at the 1996 Olympics, in Atlanta, is a crucial piece of Ali’s lasting image and mythology. But as Burns put it, “mythology is a mask.”Bryant, who argued that Ali changed the relationship between athletes and fans, was more direct about the boxer’s evolving public image in those later years.Ali in Manhattan in 1968. Despite his popularity as a boxer, Ali angered many people with his refusal to conform to public expectations.Anthony Camerano/Associated Press“People hated his guts, and white people didn’t love him until he couldn’t talk,” Bryant said. “There were people — Black and white — who still called him Cassius Clay; there were people who still did not want to give him his due. And there were people who still held a lot against him.”“Then he couldn’t talk, and suddenly he belonged to everybody,” he said.Ken Burns suggested that this public redemption was akin to “a funeral where people are talking really nicely about other people.”“And you go, ‘Why can’t we do this in the rest of our lives?’” he said. “The funeral isn’t for the person who’s dead — the funeral is for the people who are left behind, and we’re always modeling the best, most human behavior. And yet, we don’t seem to be able to bring it to our own lives.”He quoted one of the journalists in the documentary, Dave Kindred, who said that in death, Ali “can’t hurt us anymore; he can’t make us mad anymore.”“He could no longer anger us, he could no longer make it difficult for us, to force us back on our own feelings, our own beliefs, our own prejudices, Burns said. Then there’s this room to forgive and perhaps exalt.”“It’s a long process with him,” he added. “And it’s so interesting that a great deal of that positive progress is from defeat.” More