Liza writes:

Roger says, "One reason educated women don't have any kids is that they become the 2nd wife to some more successful man who doesn't want any more kids."

What a generalization! On what data does Roger basis his sweeping statement that educated women are likely to become second wives and have no kids?

It is true that more-educated women tend to have fewer children than less-educated women, but I doubt that the majority of them are second wives to men who don't want more children.