If India were to annul the IWT, the consequences might well be humanitarian devastation in what is already one of the world’s most water-starved countries — an outcome far more harmful and far-reaching than the effects of limited war. Unlike other punitive steps that India could consider taking against its neighbour — including the strikes against Pakistani militants that India claimed to have carried out on Sept. 29 — canceling the IWT could have direct, dramatic, and deleterious effects on ordinary Pakistanis.