In his review of The Gulf by Jack Davis in the July edition of Environmental History Donald Worster described an American school of environmental history as "characterized by a sense of writing in a time of ecological crisis, by a set of strong narrative skills that integrate human stories with knowledge from the environmental sciences, and, above all, by a belief that scholars can change the course of history by writing about it." The quote can be found at the top of page 599. Worster acknowledges that this is a "loose generalization" but truer of American environmental history than others. Is this a commonly accepted definition among historians? What defines other schools of environmental history?