"The current refugee crisis is the largest the world has ever seen—but it’s far from unprecedented. Back in the 1920s, civil war in Russia and genocide in the Ottoman Empire left millions of families stateless, seeking asylum in countries already stretched thin by the ravages of war. Charged with preventing catastrophe, an idealistic explorer named Fridtjof Nansen changed hundreds of thousands of lives with a piece of paper: the Nansen Passport. Although it stopped short of granting citizenship, the Nansen Passport allowed its holders to cross borders to find work, and protected them from deportation. Some experts are calling for a similar solution today."