LegioCorvus
Prince
I agree with your book recommendation, but disagree with you assertion that paraphrasing it (as I have done with other sections above) would be a disservice, whether out of a fear of unintentionally perpetuating inaccurate information or somehow "stealing credit" for another's ideas. If I took anything from that book it is that you can't stop the spread of beneficial ideas.
If you are anything like me, reading that book re-invigorated your interest in playing Civilization. Although it highlights some of the more absurd departures from realism present in the game, it succinctly summarizes the fascinating nature of the progress of human development, and in particular the eventual dominance of a few cultures (Europeans) over many others, which is in turn the focus and appeal of the game.
I just don't recommend paraphrasing it partially out of not wanting to perpetuate inaccurate information. I fail to see how it could be stealing credit when the work in question is being credited. The book, easily my favorite non-fiction, does such a thorough and excellent job addressing all the questions someone might have (at least, reasonable questions) that I feel it would actually take more effort to paraphrase it and address each point individually, when the work itself present the entire argument. To be fair, that point of view could be born out of laziness on my part.
I actually wasn't playing Civ4 the first time I read it, as I think I was finally trying KOTOR at the time, but it did re-ignite my passion for evolutionary anthropology.