Former faith-based czar John DiIulio offers us a taste of his forthcoming book, Godly Republic, blurbed by everyone and his brother from both sides of the spectrum. In this excerpt, he emphasizes the role religion can play in foreign affairs, especially in the provision of foreign aid (both governmental and non-governmental). He mentions the explosive growth of Christianity in the southern hemisphere, but could also have mentioned the increasingly signficant presence of Christians in China. On that subject, see this book and this interview.