Eva Hnizdo reflects on the impulses which drive people to emigrate - or not, drawing on her Czech Jewish family's experience of the Holocaust and her own as a political asylum seeker. "Whenever members of my family thought about emigrating but didn't actually leave, they made a mistake, sometimes paying for it with their lives. In my case, some might say I made a mistake not to stay. Was it worth the struggle?"

Eva Hnizdo is a former GP and author of "Why Didn't They Leave?"