Gregory Walter Graffin (born November 6, 1964) is an American
punk rock singer-songwriter, multi-instrumentalist, college lecturer, and author. He is most recognized as the lead vocalist, songwriter, and only constant member of the noted Los Angeles band
Bad Religion, which he co-founded in 1979. He also embarked on a solo career in 1997, when he released the album
American Lesion. His follow-up album,
Cold as the Clay was released nine years later. Graffin obtained his PhD at
Cornell University and has lectured courses in
life sciences and
paleontology at the
University of California, Los Angeles and
evolution at
Cornell University.