Had you have taken a direct flight from London to Seoul yesterday afternoon, by the time you would have landed you might have been none the wiser that anything had happened at all. At near midnight South Korean time, President Yoon Suk-yeol imposed martial law across the so-called “land of the morning calm.” Only six hours later it was subsequently, and pointedly, revoked. As South Korean citizens continue with their daily lives, the political establishment has once again entered a period of precarity. Yoon has scored a significant own goal; its implications do not end there. It is no understatement...