Last starts the book by pointing out how wrong Paul Ehrlich was in his book "The Population Bomb," which warned readers of a coming population explosion. However, I feel that Last is doing the same type of fear-mongering that Ehrlich did. I have not read Ehrlich's book, but I imagine he had the same numbers and trends to back him up as Last does in this book.
I felt the book was somewhat interesting. It's short, and It's filled with sobering statistics, trends, and anecdotes framing out coming demographic demise. I was turned off by the right-wing slant of the book (demonizing Margaret Sanger and quoting Irving Kristol). Lasts wants us to go back to the good old days of yore, meaning more church, less safety net, and less equality for women. If I were a woman, I'd be deeply offended by this book, as Last seems to be blaming them in multiple fronts for the sinking fertility rate: Legalization of birth control and abortion, women's increased role in the workforce, women's increased education, women cohabiting with partners, and therefore women having children at the tail end of their fertile years or not at all. Also, according to Last, Social Security is not only doomed to go bankrupt due to demographics, it's also the reason we don't have children (we no longer need children to take care of us in old age...). Last seems to long for a bygone time that will, thankfully, not return. The good old days were not good for everyone, and I don't think Last realizes that.
Anyway, you now know my biases. As I said, it was somewhat interesting, and a very short read (~175 pages). I skimmed over the last 10 pages because I sort of lost interest. I wouldn't really recommend it, but it seems to be popular. I don't regret reading it, but I think I need a good piece of fiction to make up for it.