Some parts of the book did seem tangential to the main point but overall I would definitely recommend it to my friends.
Earlier parts of the book are quite theoretical. Personally I didn't enjoy Part III as much. Part IV, according to me, was the best chapter in the book and was eye-opening about cultures you don't get to know about in mainstream media. I would have liked a deeper Conclusion which talks about the technological aspects of the problem. Accounting, Governance and Communication could have been their own full fledged topics. After all, this is the part the entire book built up towards.