In the coming decades, water crises will likely become increasingly common. If the population continues to grow at a rate of 1 billion people every 15 years, the Earth’s capacity to support human life will be severely strained. Population growth notwithstanding, the current supply of water is being degraded by pollution, overdrawing, and climate change. It is not too late to guarantee a safe supply of water for everyone alive today and for all future generations; although to do so would require an unprecedented level of international cooperation, trust, and compassion.