Why do we stay in Afghanistan, a non-nation of tribal divisions and perpetual lawlessness? Our purported ally Pakistan (a nuclear-armed dictatorship with rule by assassination) has a military that harbors terrorists of all kinds, including the Taliban who just wait out the Americans while striking small blows. When, not if, America leaves, it will leave Afghanistan for the Taliban and other terrorist militia to fight over. Their brutal version of Islam will take their culture back to the fifteenth century, with television and Toyotas. The Chinese will come in, bribe some warlords, and sack Afghanistan of her mineral wealth, leaving the people with nothing. However, we would be out of it. 

So let's leave now.