America should not play global judge, jury, and executioner. This role is bad for us. It harms our economy and rots our national character. Moreover, foreign wars distract from much more important goals here at home. Trump’s decision to pursue the Iran war, for instance, distracts from his much more important domestic policy goals on immigration, inflation, and dismantling leftist-controlled institutions. The political capital required to wage this war of choice is simply too high. The downside risks of being sucked into a months- or even years-long war are too great. The threat to the global economy from a sustained...