On September 19, 1960, in Karachi, the bustling port city and economic hub of Pakistan, two political leaders and a distinguished international banker convened to sign a document that would define the political and hydrological landscape of the Indian subcontinent. Jawaharlal Nehru, India’s Prime Minister; Field Marshal Ayub Khan, Pakistan’s military ruler; and William Illif, Vice President of the World Bank, affixed their signatures to what became the Indus Waters Treaty. The World Bank (International Bank for Reconstruction and Development) was no mere bystander; it was the architect behind the scenes, lending its institutional weight to broker a deal that neither nation could have achieved alone.