While the research on the subject has become increasingly solid, friendships and informal social interaction continue to be ignored to a great extent in the practice of religion in the United States. This is particularly true among the mainline churches such as Episcopalian, United Church of Christ, and Presbyterians. Using a sample of sixty- two churches from Mainline and Catholic traditions, David Caddell examines the importance of social homogeneity, social interaction, and consensus on the level of commitment that church congregations/parishes are able to generate. The findings are as...