Lee, your post reminded me of a chart in the book Why Conservative Churches are Growing (Dean M. Kelley, 1972). On page 89 is a list of "the exclusivist-ecumenical gradient" of religions, and from "most-to-least" the ratings are:
(Black Muslims*)
Jehovah's Witnesses
Evangelicals and Pentecostals
(Orthodox Jews*)
Churches of Christ
Latter-day Saints (Mormons)
Seventh-day Adventists
Church og God
Church of Christ, Scientist
Southern Baptist Convention
Lutheran Church--Missouri Synod
American Lutheran Church
Roman Catholic Church [considered "centrist"]
(Conservative Jews*)
Russian Orthodox
Greek Orthodox
Lutheran Church in America
Southern Presbyterian Church
Reformed Church in America
Episcopal Church
American Baptist Convention
United Presbyterian Church
United Methodist Church
United Church of Christ
(Reform Jews*)
Ethical Culture Society
Unitarian-Universalists
*Jewish groups should occupy a separate continuum, as should Islamic groups. They are inserted here to show where they might fall on a composite gradient.
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Sort of like the "tightly-coiled-spring" analogy.
Craig