Abstract
Many American progressives consider themselves both liberals and environmentalists, and, though the organisations representing these two causes should be working together, they rarely do. Moreover, the emerging split over the role of economic growth could push liberal and environmentalist leaders further apart. This lecture discusses how to bridge the gap between liberals and environmentalists by fusing progressive causes into a common agenda. The two causes are not, as many believe, mutually exclusive, but are instead mutually supportive: liberals need environmentalists to succeed and environmentalists need liberals to succeed