Europe braces for another flood of Afghans fleeing their country. But the world is awash with people who want to escape persecution or simply get out of crummy countries, cultures, religions, and societies. The lucky ones earn the right to immigrate, but those who leave without permission are deemed as refugees. And after the Second World War, the United Nations came up with a humanitarian refugee system designed to protect the vulnerable but also to protect destination countries from being overrun.

Read more here.