ERIK LINDBERG — The August issue of “The Progressive†featured a series of essays on “the Big Spill†in the Gulf of Mexico, with the intention, I believe, of bringing our oil addiction into the foreground of political dialogue. In his article, “Energy Extremism,†Michael Klare thus asks a vital question about the end of the oil age. It is a question that has been painfully absent from any sustained dialogue: “How, then, should progressives respond to the current [energy] crisis?â€