As Yemen’s civil conflict grinds on, the world’s worst humanitarian crisis will deepen and a political settlement will become harder to reach over the next year, driving a cycle of instability that will keep the war-torn country a geopolitical proxy theater. The civil war in Yemen recently entered its seventh year, creating what the United Nations and other international organizations now see as the deadliest humanitarian crisis in the world. And it’s a crisis that still has no clear end in sight, as cyclical warfare patterns and evenly-matched military actors on either side continuously push the conflict further away from a political settlement or cease-fire....