Will clean water be our biggest source of conflict in the future?

If you had to imagine what we will be obsessing over in 50 years, what would top your list? We put versions of that question to dozens of entrepreneurs, scientists, academics, and artists, including Richard Branson, Temple Grandin, Ian Bremmer, Ann Kim, and Bright Simons. From their 550 answers, some clear themes emerged. One such theme: water.

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