Fellow blogger and American hero (he is in the navy so stuff it!) Eddie of Live from the FDNF was inspired to read The Next Christendom by Episcopalian Philip Jenkins.
Below are Eddie's thoughts on the book
This book fills a valuable gap that has been notable in many writings of strategists (with the exception of Ralph Peters who discussed it in detail in “Hidden Unities”): the rise of Christianity in the “Global South”, i.e. the Southern Hemisphere. Already there are far more Catholics in the non-Western world (Latin America, Philippines, Africa, increasingly China) than “Western” Catholics, and the numbers are only going to rise in the near to mid-future. The author offers a fascinating portrait of what kind of Christianity exists in the Southern Hemisphere (his conclusion is that many of the “Southern” churches are a return to the “roots” of Christianity, i.e. before the Romans “widely” sanctioned it.), what likely impact the rising Southern populations will have on the global church leaderships (Catholic, Pentecostal, etc) and policies (liberal churchgoers are in for a hell of a surprise when their campaigns to liberalize issues like gay marriage and abortion within the church come up against the even more conservative global South) and the impact of the two great surging (and often competing (in countries like Nigeria)) religions, Islam & Christianity, in the future.