The Indus Waters Treaty of 1960 has kept two nuclear-armed rivals – India and Pakistan – in a stable river sharing arrangement for more than six decades. Yet that significant achievement now seems to be at risk.

India’s government has stated it is holding the treaty in abeyance and is threatening to cut off water to Pakistan after a terrorist attack killed more than 20 Indian citizens in late April 2025. India’s Prime Minister Narendra Modi described the treaty as a “blunder” and a “betrayal” of India’s dignity committed by then Prime Minister Jawaharlal Nehru, and proclaimed that “blood and water cannot flow together.”