Abstract

The environmental movement continues to be a dynamic force for protection of the environment despite new organizations emerging from the “birthing” process of the formation of new groups via factions and schisms. I focus on two aspects of the evolution of the environmental movement: how do new organizations emerge from existing environmental groups via benevolent or divisive mechanisms; and, which organizations produce new organizations? I develop a family tree of the American environmental movement from 1955 – 2005 and identify the mechanisms that result in the formation of new organizations from a sample of 48 environmental organizations. I use social network analysis to identify which environmental organizations were most likely to produce new groups and set the stage for future inquiries into how new environmental organizations reestablish and maintain connections with their progenitors.