Extending his 1970 Cross of Culture back in time to the 1870s and 1880s and in space to the Middle Atlantic and New England states, supplementing data from homogeneous areas with more sophisticated techniques of linear regression and correlation analysis, treating the connections between religious beliefs and social actions subtly and in great depth, Paul Kleppner has produced perhaps the most impressive work of what he insists should not be called "the ethnocultural school." Apparently reacting to charges that what he prefers to term "the voting behavior studies" have ignored class factors, reflected their authors' supposed political conservatism, and represented a consensus version of American history, Kleppner has included headnotes from...