I personally don’t think that it is as significant as Guns, Germs, and Steel: The Fates of Human Societies was, though perhaps it should be just as (if not more) ground shaking for modern society. As a long-time student of evolutionary biology and other fields related to this work, I’m not as impressed with the effort as I might otherwise be since most of the overarching thesis is second nature to me. It does however have some superb anecdotes and broad reviews of large areas of literature to provide some excellent motivation that I might not otherwise have spent the time to find thus giving it some excellent value to me.
As for others in the general public, I highly recommend it for it’s simple and clear examples and the ultimate thesis which are exceptionally worth reading (and implementing) into one’s life as well as into broader areas of modern society. If nothing else, it points out how drastically life has changed for human societies even in the last 150 years, much less the last 10,000.
For those in the field or with an interest in Big History, this is certainly a must-read and possibly an excellent place to start for those without any background at all.
Based on my own personal background, I’d give this 3 stars (in terms of it’s direct value to me), but for the general public it’s easily a 5 star work. I do wish that it had been more traditionally and extensively footnoted, but for a broader audience I certainly understand Dr. Diamond’s reasons for publishing it as he did.