Lived as a child in England, the Middle East and Singapore. At the
University of Texas, he worked as a student cartoonist at the same time
as Robert Rodriguez.
An outspoken atheist, has been involved in secular humanist and
church/state separation activism.
In the early 1990s, Wagner was a prominent figure in the short-lived
comics self-publishing movement, along with Dave Sim (Cerebus), Jeff
Smith (Bone) and Colleen Doran (A Distant Soil).