Listen now (76 min) | Josh: World War I shattered empires, ethnic cleansing created nation-states ... How the US and Russia wound up cooperating to fight ISIS and Sunni militias ... Why Turkey is holding up NATO membership for Sweden and Finland ... By helping to keep Syria divided, is the US giving ISIS free rein? ... What Turkey wants in exchange for letting Sweden and Finland into NATO ... In retrospect, should the US not have intervened in Syria? ... Why Russia-Ukraine might become another devastating frozen conflict ... Josh: Putin misapplied the lessons of Syria to Ukraine ... How US sanctions impede conflict resolution in the Middle East ...