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the worst nightmare on the subcontinent is Pakistan, whose dysfunction is directly the result of its utter lack of geographic logic. The Indus should be a border of sorts, but Pakistan sits astride both its banks, just as the fertile and teeming Punjab plain is bisected by the India-Pakistan border. Only the Thar Desert and the swamps to its south act as natural frontiers between Pakistan and India. And though these are formidable barriers, they are insufficient to frame a state composed of disparate, geographically based, ethnic groups—Punjabis, Sindhis, Baluchis, and Pashtuns—for whom Islam has provided insufficient glue to hold them together. All the other groups in Pakistan hate the Punjabis and the army they control, just as the groups in the former Yugoslavia hated the Serbs and the army they controlled. Pakistan’s raison d’être is that it supposedly provides a homeland for subcontinental Muslims, but 154 million of them, almost the same number as the entire population of Pakistan, live over the border in India.
To the west, the crags and canyons of Pakistan’s North-West Frontier Province, bordering Afghanistan, are utterly porous. Of all the times I crossed the Pakistan-Afghanistan border, I never did so legally. In reality, the two countries are inseparable. On both sides live the Pashtuns. The wide belt of territory between the Hindu Kush mountains and the Indus River is really Pashtunistan, an entity that threatens to emerge were Pakistan to fall apart. That would, in turn, lead to the dissolution of Afghanistan.
The Taliban constitute merely the latest incarnation of Pashtun nationalism...