For those interested in the evolution of faiths, Philip Jenkins' The Next Christianity discusses the demographic and doctrinal changes ahead for the Catholic Church.
If we look beyond the liberal West, we see that another Christian revolution, quite different from the one being called for in affluent American suburbs and upscale urban parishes, is already in progress. Worldwide, Christianity is actually moving toward supernaturalism and neo-orthodoxy, and in many ways toward the ancient world view expressed in the New Testament: a vision of Jesus as the embodiment of divine power, who overcomes the evil forces that inflict calamity and sickness upon the human race. In the global South (the areas that we often think of primarily as the Third World) huge and growing Christian populations — currently 480 million in Latin America, 360 million in Africa, and 313 million in Asia, compared with 260 million in North America — now make up what the Catholic scholar Walbert Buhlmann has called the Third Church, a form of Christianity as distinct as Protestantism or Orthodoxy, and one that is likely to become dominant in the faith. The revolution taking place in Africa, Asia, and Latin America is far more sweeping in its implications than any current shifts in North American religion, whether Catholic or Protestant. There is increasing tension between what one might call a liberal Northern Reformation and the surging Southern religious revolution, which one might equate with the Counter-Reformation, the internal Catholic reforms that took place at the same time as the Reformation — although in references to the past and the present the term "Counter-Reformation" misleadingly implies a simple reaction instead of a social and spiritual explosion.