When Protestants ran the show : when homogeneity ruled, 1607 to 1955
More rings in the circus : realized pluralism, after 1955
Is there still a tent, or are there many tents? : Protestantism gone public, within pluralism.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
The Protestant voice in American pluralism by Martin E. Marty. ISBN 0820325805. Published by University of Georgia Press in 2004. Publication and catalogue information, links to buy online and reader comments.
