Peter Yarrow, renowned for his role in the folk trio Peter, Paul & Mary, has died at the age of 86 due to bladder cancer. Born on May 31, 1938, in New York, Yarrow gained fame in the 1960s with hits like ‘If I Had a Hammer’ and ‘Puff, the Magic Dragon.’ The group, known for their progressive activism during the civil rights movement, dissolved in 1970 but reunited in 1978. Yarrow’s legacy includes not only his music but also his dedication to social causes, including the launch of the anti-bullying program Operation Respect.