Finally finished this. For a short book, it certainly took me a while to get through.
Despite being initially promising, I was a bit disappointed with it in the end. The bits actually describing the classic civilisations were great but there weren't enough of them. Instead, nearly every page contained a snotty remark about the author's own political views, often actually ascribed to the ancients themselves, e.g., "I suspect the Greeks/Romans would have found this ridiculous." That always felt out of place - either back it up with evidence or don't say it!
What made it even worse (for me) was that the author has diametrically opposed political views to myself, so a lot of the comments felt particularly snippy. I'd have had no problem if both left and right had been criticised equally but that was not the case. That was, in the main, why I found it difficult to read for longer than a chapter at a time. In places, it felt unbearably vitriolic and sarcastic with no attempt at constructive criticism. I didn't pick this book up to get a preaching about the evils of socialism, I wanted to learn more about the Greeks and Romans. When the author stuck to what he knew about, the book was engaging and informative (I found the bits about science particularly interesting having just read Science and Poetry), but, a bit like Midgeley's book, there wasn't enough of that to keep me interested. Next time, keep your own views out of it!