LOS ANGELES >> Peter Yarrow, the singer-songwriter best known as one-third of Peter, Paul and Mary, the folk-music trio whose impassioned harmonies transfixed millions as they lifted their voices in favor of civil rights and against war, has died. He was 86.

Yarrow, who also co-wrote the group’s most enduring song, “Puff the Magic Dragon,” died Tuesday in New York, publicist Ken Sunshine said. Yarrow had bladder cancer for the past four years.

“Our fearless dragon is tired and has entered the last chapter of his magnificent life. The world knows Peter Yarrow the iconic folk activist, but the human being behind the legend is every bit as generous, creative, passionate, playful, and wise as his lyrics suggest,” his daughter Bethany said in a statement.

During an incredible run of success spanning the 1960s, Yarrow, Noel Paul Stookey and Mary Travers released six Billboard Top 10 singles, two No. 1 albums and won five Grammys.

They also brought early exposure to Bob Dylan by turning two of his songs, “Don’t Think Twice, It’s All Right” and “Blowin’ in the Wind,” into Billboard Top 10 hits as they helped lead an American renaissance in folk music. They performed “Blowin’ in the Wind” at the 1963 March on Washington at which the Rev. Martin Luther King Jr. delivered his famous “I Have a Dream” speech.

Yarrow played roles onstage and offstage at the iconic Newport Folk Festival in 1965 when Dylan went electric. Yarrow was on the festival board and emceed the show, begged Dylan to go back on to play another song after his blistering set, a scene captured in the 2024 biopic “A Complete Unknown.” Dylan took Yarrow’s acoustic guitar and played “It’s All Over Now, Baby Blue.”

After an eight-year hiatus to pursue solo careers, the trio reunited in 1978 for a “Survival Sunday,” an anti-nuclear-power concert that Yarrow had organized in Los Angeles. They would remain together until Travers’ death in 2009. Upon her passing, Yarrow and Stookey continued to perform both separately and together.

Born May 31, 1938, in New York, Yarrow was raised in an upper middle class family he said placed high value on art and scholarship. He took violin lessons as a child, later switching to guitar as he came to embrace the work of such folk-music icons as Woody Guthrie and Pete Seeger.

Upon graduating from Cornell University in 1959, he returned to New York, where he worked as a struggling Greenwich Village musician until connecting with Stookey and Travers. Although his degree was in psychology, he had found his true calling in folk music at Cornell when he worked as a teaching assistant for a class in American folklore his senior year.

“I did it for the money because I wanted to wash dishes less and play guitar more,” he told the late record company executive Joe Smith. But as he led the class in song, he began to discover the emotional impact music could have on an audience.