Walzer admits that he doesn't know or discuss South America, or Africa, or the Middle East. So, basically, this whole book is low-key shoddy, 'half-assed', and the information is elementary, obvious, & mild. It's like someone choosing to describe the colors of rainbow: This one is a mix of blue & green, and this one over here resembles yellow. Like, wow, thanks Walzer for breaking that down. Really needed to read a book on that.
A very short book and even then I was skimming, it felt too long after p.50. Substitute a solid, profound maxim or adage for this book and you'll be better off. It comes in tones that are too abstract & general, as if he were trying to write for posterity. It hardly gets specific, only with Amish & Hasidic communities (it barely mentions Mormons), it doesn't reveal any sensibility for Islamic communities (so it completely leaves out Iran, Malaysia, et. al.), it says nothing about the vast history & nature of China, it has nothing to say for all of Latin America, it entirely leaves out India, and it has so little compassion, attention, or respect for indigenous peoples. I don't recommend this and only applaud its good intentions.