*1958
Dale Allen Pfeiffer is a geologist and writer from Michigan, U.S. who has investigated and written about energy depletion and potential future resource wars. He has also written about class war, sustainability, direct action and the environment. He is also an anarchist activist and a member of the Industrial Workers of the World. In 1999, he was one of the organizers of a hunger strike to provide medical care for political prisoner Leonard Peltier.In 2007, he retired from writing nonfiction. Since that time, he has been busy writing fiction under a pen name (PD Allen).