is a professor of economics at Indiana State University. His research interests are macroeconomics, ecology, and development. Together with John Bellamy Foster he did pioneering work on the ecological dimension in Karl Marx’ work.
is professor of sociology at the University of Oregon in Eugene and editor of the Monthly Review. He has published extensively on political economy, maxist theory and ecology, for example Marx’ Ecology. Materialism and Nature (2000). He did pioneering work on the ecological dimension in Karl Marx’ work.