Carroll and Ratner’s (1996) study of movement activism in the Greater Vancouver area exemplifies these processes well. By looking at the joint affiliations of over 200 activists in 7 social movement (labor, urban/ antipoverty, Overlapping memberships constituted a cote bloc of labor, peace, and urban /antipoverty organizations. Feminist and environmental organizations were linked to this bloc through their connections to labor and peace movements (1996: 605-6). While the specific pattern of linkages discovered by Carroll and Ratner need not be taken as the norm, and it may well vary substantially in different periods and localities, the Vancouver study still shows the potentiality of a network approach to the study of movement sectors.