Supervisor David Chiu wants San Francisco to become the first American city to oppose any ban on sex-selective abortions. It apparently has not occurred to him why no other city has chosen to do so. Journalist Mara Hvistendahl, author of "Unnatural Selection: Choosing Boys Over Girls, and the Consequences of a World Full of Men," estimates that sex-selective abortions have "claimed over 160 million potential women and girls -- in Asia alone." Thus, it is rather disturbing to watch one of the most liberal politicians in liberal San Francisco grandstand in defense of a practice that devalues -- destroys, actually...