A curious argument has appeared in recent commentary on the war. It gained renewed prominence when otherwise serious political leaders claim that no clear explanation exists for why the conflict serves American interests. The argument goes further, asserting that when President Donald Trump is asked for a rationale, he offers none; that his advisers offer none; and that no coherent justification has been presented. This claim does not advance debate — it prevents it. By asserting that no reasons exist, commentators avoid engaging with the reasons that have, in fact, been discussed for decades. One may certainly argue that the...