Convulsed by war and civil strife for decades, Afghanistan has experienced some of the largest ebbs and flows of migration anywhere in the world.
It began with the Soviet invasion in 1979, which sent millions of Afghans fleeing to Iran and Pakistan. When the Taliban were driven from power in 2001, many Afghans began returning home.
Now, the country has hit another milestone: For the first time since 2002 and the beginning of the current war in Afghanistan, the country has a negative migration rate — more Afghans are leaving than returning.
