Two of the wisest sages of all time — Mark Twain and Jesus Christ himself — spoke memorably about the dangers of worrisome do-gooders run amok. Indeed, it is the curse of do-gooders the world over to find fault in everyone except themselves. And they usually do great harm when they “fix” things that usually are not broken — all in the odious name of self-righteousness. “Nothing so needs reforming as other people’s habits,” Twain observed. And in the Sermon on the Mount, it was Jesus — a famous carpenter, among other things — who warned that do-gooders would be...