Peter, Paul & Mary were an American folk group formed in 1961, consisting of Peter Yarrow, Noel Paul Stookey, and Mary Travers. Known for their harmonious vocals and politically-infused lyrics, they played a crucial role in popularizing the folk genre during the 1960s. Their influential works include hits like "If I Had a Hammer," "Blowin' in the Wind," and "Puff, the Magic Dragon," each of which have become standards in the folk music canon. The trio's keen balance of traditional folk standards and contemporary social commentary solidified their place as one of the most enduring acts of the American folk revival movement.