The world is experiencing a profound break from the orthodoxy of globalisation. President Donald Trump and his MAGA movement didn’t invent isolationism - the concept goes back to ancient Greece. So what's the appeal of self-sufficiency, from a nation-state level down to the individual? Plus, a story of changing polices and attitudes to children in China -  a journalist tracks down a stolen child, and reunites twins who grew up separately in China and Texas.