The most unusual thing about this book is that, while it is written by a professor, about an academic topic, it is presented in a "popular" format. From the look and feel of the book, to its lack of bibliography and minimal footnotes, and most importantly to its easier prose and explanations, it's not what I expected at all!
On the other hand, it does do something which very little contemporary thought does -- connect the dots from the beginning of the Western story to now. Sunshine explains what the Roman culture was like, how it was changed by Christian ideals, and finally how it is "changing back" as Christian influence wanes. The last chapter of the book ties this together very well. Put all together it is a compelling story -- the great achievements of our civilization (most importantly the discovery of modern science, and human freedom) were because of Christian ideas and we are losing the foundation upon which they were built. This breaks not only the spell of Marxist anti-Western views of history, it also breaks the spell of pro-Western but anti-Christian versions of the story.
Midway through the book, I was encouraged in realizing that thinkers like Sunshine and Rodney Stark who he draws on, are bringing our view of the past out of the captivity it was held in by the anti-Christian stream of the Enlightenment. This is actually what makes the best part of the book -- he casually explodes myth after myth by presenting facts that are not widely broadcast such as the fact that no scholar of the Middle Ages believed in the flat earth! The net it is present a different view of the past. The breadth of areas where Sunshine does this must have required a lot of work and insight -- it's too bad he doesn't document it and bring this up to a more academic level. He interleaves philosophy, history and political science well to tell his story.
The final chapter was however personally discouraging. It was a realistic look at the kind of ideologies currently being advanced in our society. It was hard to read through this list without a sense of being overwhelmed or hopeless understanding that these ideas will have dire consequences in the future.