Want to see a textbook example of the kind of thinking that leads to the fall of civilizations? View the video of Richard Haass, President of the Council Relations on today’s Morning Joe. A clip was played of Donald Trump favoring a declaration of war and repeating his call for the restriction of Muslim immigration, in particular Syrian “refugees,” that we know little or nothing about. A hand-wringing Haass argued against “cutting down immigration” and other measures, because “our connections with entire populations and communities, our best measure of defense is making sure that people in these communities are working...