There are a dozen diagnoses for the decline of Christianity in America: church models, church polity, musical style, position on end times, use of technology, whether your minister wears boxers or briefs...
How about this one: Much of what passes for Christianity in the West is Christ-less. Michael Horton's book is a compelling expose on the topic. If you're going to read a book before then end of this year, read this one: Christless Christianity: The Alternative Gospel of the American Church (Hardcover)
