In the ivory tower today, the idea that marriage is good is apparently considered an extremist notion. On the other hand, the idea that there are few real differences between normal men and convicted rapists is regarded as cutting-edge theory. That, at least, seems to be the conclusion of Harvard University Press, which recently, and under highly unusual circumstances, rejected an important new book on the benefits of marriage. The book — The Case for Marriage: Why Married People Are Happier, Healthier, and Better Off — is by Linda Waite and Maggie Gallagher, and has just been published, to considerable...