Like religious fundamentalists seeking to stamp out the teaching of evolution, feminists stomped Harvard University President Lawrence Summers for mentioning at a January 14 academic conference the entirely reasonable theory that innate male-female differences might possibly help explain why so many mathematics, engineering, and hard-science faculties remain so heavily male. Unlike most religious fundamentalists, these feminists were pursuing a careerist, self-serving agenda. This cause can put money in their pockets. Summers's suggestion -- now ignominiously retracted, with groveling, Soviet-show-trial-style apologies -- was that sex discrimination and the reluctance of mothers to work 80 hours a week are not the only...