Liberals are forever struggling to understand the basic tenets of human nature that most other people just take for granted. You’d think they would have picked something up from the death throes of the Soviet Union, Greece, or Detroit, but as Talleyrand might say, “They have learned nothing, and forgotten nothing.” Whether that’s some sort of genetic defect liberals are born with, ignorance, or just willful blindness is hard to say, but the results are the same in any case. Since it’s easier for light to escape a black hole than it is for a liberal to entertain a new...