I don't like Toynbee very much either. However, I take issue with your idea that more teenage abortions is a class war thing. Everything I know about the demographic situation suggests that the majority of those teenage abortions are performed on girls from "nice middle class" or "chattering class" or "ruling class" (ugh, really?!) backgrounds. As you've pointed out before, teenagers from working class backgrounds have that much less to lose from having kids at a young age, and broadly speaking tend to come from backgrounds with somewhat more conservative attitudes about abortion anyway.

I do agree with you that more kids having abortions isn't something to be celebrated. And that there are other good life plans apart from going to university. But I think one has to be careful with that sort of attitude. Even now, a university education is one of the best drivers of class mobility. I'm not saying everybody should aspire to be middle class, but I also very much don't want to entrench the idea that if you were born into a plebeian background you should just be satisfied with your proper place in life and not bother with that fancy edumacation stuff.