If you want to learn about the author's feelings and musings about modern society cloaked in the history of our species, this book is for you. If, however, you, as I did, want to learn something scientific about the progress of our species unspoiled by a political screed, search for something else. Rarely have I felt that I misspent money on a book. In this case, I did. Too bad because it might have been an interesting read. I could go on, but it's not worth more of my time.