The war in Ukraine has created the greatest flux of refugees in Europe since the second world war. We visit Poland, where the response has been remarkably smooth, and a New York neighbourhood that is no stranger to émigrés from the region. And we consider the displaced who are largely overlooked: why are so many Russians exiling themselves in Turkey?For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer
 See acast.com/privacy for privacy and opt-out information.