We have Panmunjom, the inter-Korean talks, the (abandoned) six-nation talks, the New York channel, Curt Weldon, and Selig Harrison. We have Kaesong and Kumgang and several more planned industrial parks that never got off the ground. You wouldn’t think that the missing piece in our diplomacy with self-isolated North Korea is yet another attempt to “engage” them, if “engage” means “pay,” as it usually does, and “North Korea” still just means the North Koreans on the reviewing stand. The Boston...