Rivers are more than what Samuel T. Coleridge poetically expressed in Kubla Khan: ‘meandering with mazy motion’ and falling into the ‘sunless sea’. Rivers are life-givers, carrying a mystic and sacred quality about them. That they are oft described as being ‘mighty’—the mighty Amazon; the mighty Nile; the mighty Brahamaputra; the mighty Murray; the mighty Mississippi and Missouri—is hardly mystifying. Civilizations have grown around it and flourished. In contemporary politics the salience of rivers cannot be overlooked both in terms of being drivers of cooperation and conflict.

Like in the 1950s, the word ‘riparian’ is back again in the India–Pakistan lexicon, becoming this time intensely political, emotional and divisive. This development is both instructive and unsettling. It is instructive to note how the current water realties of the two countries, which have changed significantly since the Indus Water Treaty (IWT) in 1960, will now determine the treaty's future. With growing populations, inadequate water management techniques and the impact of global warming, water resources are under pressure.