David Ignatius

U.S. adversaries exploit power gaps. It's easier for Russia to invade Ukraine with irregular forces out of uniform, the so-called 'little green men,' than to send a conventional army that would challenge NATO.

Middle Eastern wars rarely end with outright victory and permanent stability, so the word 'settlement' may promise too much. At best, for many years, it may simply mean stable ceasefire lines, reduced bloodshed, fewer refugees, and less terrorism.