The global water system has long been a balance of supply and demand, climate variability, and human activity. Recent decades show a clear uptick in stress, especially in arid regions. Yet the story is not uniform; some areas experience abundance while others face chronic shortages.
To understand the present crisis, we must first review baseline conditions, track the shifts that have occurred, evaluate competing explanations, and finally consider what these patterns mean for future resilience. Only by following this disciplined approach can we avoid simplistic conclusions.