This reviewer takes issue with the author’s philosophy - namely the author seems to advocate for a ‘one world system’ as a workable solution for future peace:
https://www.researchgate.net/publication/303263602_Book_Review_of_WAR_BEFORE_CIVILIZATION
Does anyone who has read the book care to weigh in on this?
Yes, the author has that philosophy. The “one world” stuff is at the end of the book and does not detract much from his research.