There is clean water i any lake or stream and fresh food is available in every animal. Simple minded people are the problem. All the Vegans will die early.
During a zombie apocalypse, nobody would be breeding animals meaning there would be less to go around. And if everyone is killing them, they will eventually run out.
Same goes with water cleaning plants. Yeah there will be streams and rivers and stuff, but what if they become infected or dirty? Then what?
I guess we fall back on the Native American philosophy. Water is good 200 yards downstream and I'm pretty sure squirrels and bear aren't going to run out anytime soon. But we might have to resort to oh, I dunno, deer, Deer are the single most populous wild animal in North America. And they breed well.
It’s an identity crisis, we don’t know who we are. I think capitalism has eradicated so many problems that previously plagued mankind to the point where in the first world a lot of people are feeling separated from their humanity. For thousands of years our performance in the face of adversity is what defined our lives, could you raise crops, livestock, a barn, a family. Now obedience and acquiescence is all you need to survive for 80 years. The fascination with world-ending scenarios is that we would finally have ourselves tested, good or bad.
So like if a zombie apocalypse does happen most of us would die from disease to become the zombies. So like most people are just waiting to become a zombie
Sooner or later they will run out.
Same goes with water cleaning plants. Yeah there will be streams and rivers and stuff, but what if they become infected or dirty? Then what?