Spong’s general thesis is popular with many mainline Protestants, including those in the United Methodist, Evangelical Lutheran, Presbyterian (U.S.A.) and Episcopal churches. Spong’s work has won favor with academics, too. Praising Spong’s work specifically, Karen L. King of Harvard Divinity School said in a review of Spong’s book that it “should be required reading for everyone concerned with facing head-on the intellectual and spiritual challenges of late-twentieth-century religious life.” Harvard Divinity professor and liberal theologian Harvey Cox said “Bishop Spong’s work is a significant accomplishment,” and indeed, Cox himself has long been at the task of shifting Christianity to meet the needs of the modern world. Thus, liberal theology has been taught for decades in mainline seminaries and preached from many mainline pulpits. Its enduring appeal to embattled clergy members is that it gives intellectual respectability to religious ideas that, on the surface, might appear far-fetched to modern audiences.

But the liberal turn in mainline churches doesn’t appear to have solved their problem of decline.

https://www.washingtonpost.com/posteverything/wp/2017/01/04/liberal-churches-are-dying-but-conservative-churches-are-thriving/?utm_term=.6d503d3883fd