Over at the Touchstone web site, they have put a book review of mine online. Two years ago I reviewed D.A. Carson's Christ and Culture Revisited (Eerdmans, 2008). I enjoyed the book, although I offer a criticism or two in the review. If one is working through these issues, Carson provides a very helpful summary of Niebuhr's classic work, Christ and Culture, criticizes aspects of Niebuhr's analysis, attempts to bring the discussion up to date, and then offers his own positive proposal. The review can be accessed here.