For nearly a decade, Dan Buettner has researched the places people live longest, healthiest and happiest.
It’s hard to imagine now but Syria used to be a sanctuary from violence. But today, of course, Syria is engulfed in a civil war.
So Iraqis who fled their own country’s civil war during the Iraq war are fleeing the violence in Syria. They’re going home to Iraq and more violence there.
The BBC’s Caroline Hawley reports from Baghdad.