These things all deserve consideration, but it bears remembrance what the human lifespan was at the dawn of the 20th century - generally half what it is now. We die of things now we never had a chance to die of before because we had not yet harnessed the hydrocarbon to free ourselves from backbreaking manual labor, or run many of the then-yet uninvented machines that electricity would power, which would change every aspect of our lives and our relationship with our biome. Including the sheer numbers of us pursuing "personal happiness and fulfillment..." People complaining about minute issues (such as those you listed) which may (granted) have adverse effects upon us now, forget the massive gains in public health that have already been achieved. Perhaps you think history is some sort of linear progression? (now that's a very WESTERN perspective...) that there's some unending directional progress?
We are here at all not because anyone planned it. And we will be eradicated sooner or later also not due to anyone's plan, but because statistics are simply not on our side. 99.9 percent of all species that ever lived are extinct. The universe doesn't give a rat's ass about our species or our happiness. We should be happy with our little time here. And with what we have manged to create and learn about the life around us.
Politics is what it is because there are simply TOO MANY PEOPLE. This merely magnifies the corruption that would be there anyway, but on a smaller scale.
And BTW, those armageddonish survivalist fantasies of "arming up and taking shelter" are just our culture's solipsistic Fantasia. You really can't want to be in that situation - defending your home like that when society has utterly broken down. We are not bronze age men anymore (even though their monotheistic religions still plague us) - we have been domesticated, just like dogs. Existence will not be worth anything if all the refinements of our domestication (culture, art, language, learning) fall away and it becomes who has the biggest ammo stockpile. I will take myself out before I have to live in THAT world... and those that "win" that survival contest will have nothing left when the creatives are gone.
Of course, that's where all the new religions will come from, as before. How many thousands of years will the next collapse take? Well that go-round is less likely because THIS collapse, won't be just of us; it looks to be the entire planet this time, not just an Easter Island here, a Greenland there... Every carefully orchestrated and evolved food chain and set of biological dependencies. Billions of years of evolution... if just one species, say, the Tuna, disappears, that will cause a chain reaction and destroy a web of evolution going back hundreds of millions of years.
Worth saving? yes, but only to us. Nothing will stop us from being stupid. Ammo sales are off the charts, BTW.
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