We may have to, as the planet dries up and whole populations are on the move, bent on conquest. It's only a few generations off. A few billion people will be on the move, trying to survive and everything that you think you know now, will be gone. The Middle East and Maghrib will be totally uninhabitable with no water and daytime summer temperatures in the high 50s, daily. The Saudis are going to learn the ultimate lesson from Allah when they find out that they can drink either money nor oil.
The Ganges ... no more Himalayan meltwater The Yangtse .... same. How may billions are in those two places? ?
The US will dry up in places, splinter into pieces (that may happen in the next decade) and angry, entitled, well armed Americans will invade us.