psst...marxism/communism/socialism marches on, attempting to grab control of production using environmentalist arguments.
In this article, Dr. Gray is talking about the failure of the Soviet project, which involved a model of centralized state planning. It is this model which is discredited. You may call the environmentalists and others socialists, but their methods are different; they are working within the liberal democratic system, and their remedies will be liberal democratic remedies, not Soviet remedies. I.e., expect lots of feel good indoctrination and government regulation working within a free market, not centralized state control of everything. This kind of activist "marxist" policy does not conflict with neo-liberal economics as long as it operates within the liberal democratic system. Western marxism so operates; Communist or Soviet marxism did not.