An activist, poet, musician and writer, Mark Green works in the public interest sector. He was the founding executive director of the largest environmental organization on the North Coast of California, Sonoma County Conservation Action, and led campaigns which transformed the land use, water and transportation policies of his region during his ten-year tenure with that organization. An atheist from birth, Mark began to participate in Pagan community rituals and seasonal celebrations in 1987. but in 2004, growing insistence on literal belief in gods in that community led to a critical reassessment that ultimately resulted in the book "Atheopaganism".