Pakistan is looking more dangerous and precarious by the week. The only Muslim country in the world with an arsenal of nuclear weapons is now threatened by a ferocious and rapidly expanding Taliban insurgency. The most retrograde Islamist army on earth has conquered territory just a few hours’ drive from the capital. Though this discouraging outcome wasn’t inevitable, it was at least likely. As Robert Kaplan pointed out in an insightful essay in the current issue of Foreign Policy magazine, “the Taliban constitute merely the latest incarnation of Pashtun nationalism.” And ethnic Pashtuns live on both sides of the Afghanistan-Pakistan border. “Indeed,” Kaplan adds, “much of the fighting in Afghanistan today occurs in Pashtunistan: southern and eastern Afghanistan and the tribal areas of Pakistan.”

