The singer-songwriter and social activist best known as one-third of the folk-music group Peter, Paul and Mary, has died at age 86.

Peter Yarrow, along with Noel Paul Stookey and Mary Travers, had a deep love for the genre and a commitment to confronting social issues in their music. Their self-titled debut album, Peter ...

Peter, Paul, and Mary quickly became one of the most successful folk acts of the 1960s; their 1962 debut album went double Platinum and their recording of “If I Had a Hammer” won two Grammys.

Throughout the 1960s, Peter, Paul, and Mary — Yarrow, Noel Paul Stookey, and Mary Travers — released six Billboard Top 10 singles, two No. 1 albums, and won five Grammy Awards. The group also brought ...

While he made an undeniable impact on the music scene of the '60s, Yarrow was convicted in 1970 for "taking indecent liberties with a minor" and served three months in prison for the offense. He was ...

Peter, Paul and Mary sat atop the folk music sensation of the 1960s, and scored their sole No. 1 hit with "Leaving on a Jet Plane" (written by John Denver). Their debut album, "Peter, Paul and ...

began performing as Peter, Paul and Mary in 1961, making their name by performing in New York City's nightclubs and coffeehouses. Their self-titled debut album, released a year later, topped the ...

Peter, Paul and Mary rode the folk-pop tsunami of the early ... (The Hammer Song),” which drove their eponymous debut studio album to spend seven weeks atop the Billboard 200 and go double ...

Peter, Paul and Mary released 13 albums from 1962 to 2004. They won five Grammys out of 16 nominations. After Travers’ death in 2009, Yarrow and Stookey, 87, continued performing as a duo.

The singer and songwriter who helped popularize folk music in the 1960s died of bladder cancer at his home in New York.