What makes The Peter, Paul and Mary Album by Peter, Paul and Mary notable?

The album includes the hit 'And When I Die', which became a staple of the folk genre and showcased the trio's ability to tackle serious themes within accessible music. It also contributed to their overall commercial appeal, reinforcing their position on the charts during a pivotal time in folk music history. Released in 1966, this album marked Peter, Paul and Mary's fourth studio effort, following their successful third album 'In the Wind' from 1963. At this point in their career, they were cementing their status as leading figures in the folk music revival of the 1960s, known for blending traditional folk with contemporary themes and social issues.