Someday in the future people will try to figure out the history of the United States of America (or Western civilization in general) in the twentieth and twenty first centuries and think that there must have been something wrong with the drinking water as to make people so stupid as to destroy their civilization over the most mundane issues of the time (i.e. Climate “Change”). IMHO
Starvation, poor health, parasite and dangers of all kinds. Heck, our ancestors didn't live beyond 35 years of age. Just old enough to create the next generation and make them self sufficient and then die.
We have it pretty damn good and yet people are willing to give it all away. And make no bones about it, environmentalists believe that there are too many humans and that we are burden to the planet and other species and if there were fewer humans that that would be just fine.