He always believed, with his whole heart, that singing together could change the world.

hey don’t stop believing in magic dragons."

“He was best man at my wedding and I at his.

Peter Yarrow

Peter Yarrow.Credit:John Lamparski/WireImage

He was a loving ‘uncle’ to my three daughters.

“In that class, I saw the transformational power folk music had,” YarrowtoldWestwordin 2015.

It became the soundtrack of that change.”

Peter, Paul and Mary in 1983

Peter, Paul and Mary in 1983.Paul Natkin/Getty

Travers and Stookey were soon recruited, marking the start of Peter, Paul and Mary.

and Yarrow’s own “Day Is Done.”

Throughout their time together, Peter, Paul and Mary earned five Grammys, released two No.

Peter, Paul and Mary in 1967

Peter, Paul and Mary in 1967.Santi Visalli/Getty

1 albums, and scored six top-10 hits.

1 hit, a cover of John Denver’s “Leaving on a Jet Plane.”

Gai Terrell/Redferns/Getty

Yarrow served three months in jail and was ultimately pardoned by President Jimmy Carter in 1981.

Peter Yarrow in 1964

Peter Yarrow in 1964.Gai Terrell/Redferns/Getty

After their 1970 split, Peter, Paul and Mary reunited eight years later for an anti-nuclear-power concert.

Yarrow was known to perform with his daughter, a folk singer and activist in her own right.