There are two main forces that tell us life was better before.
One group tells us that two individuals existed in a perfect garden roughly 6000+ years ago, and that the animals were able to speak to them. Then through a “fall”, man lost immortality and animals lost intelligence, and we were able to reproduce. (in my opinion is true immortality.)
There will be a coming “judgement” and afterwards a “return to eden”.
On the other side, the godless group tells us, that when we were “noble savages” that was eden, we were in harmony with nature, we didn’t pollute and cause global warming. And now there will be a coming apocolypse, judgement, of global warming, afterwhich the survivors will have to “return to eden.”
The problem with both of these myths is that they pre-suppose we are at a low point right now, and that in the past we were “higher”. That’s opposite of the way the world works. Not only that, but only through our technology and advancements, were many of these people able to experience existence. Only through the religious “fall”, were we able to be born.
Both statements of the past are false. Mortality (death rates) were MANY MANY times higher in this “noble past”. Living with nature is NOT and never will be comfortable. You’ll constantly have to worry about whether the tiger is going to come and eat your baby. You have to worry about the bugs that are biting you aren’t going to give you some deadly fever.
So if both groups are wrong about the past, both groups are also wrong about the future. If global warming is going to happen to the extent they say (there’s no question it’s “warmer”, the problem is the models predicting the future.) we will adapt. When Siberia became inhabitable, the farmers just moved further south. When the temperatures become warmer, people will just migrate north. If the sea level raises, we’ll see more cities on the coast that have adapted the way the dutch have.
More CO2 in the atmosphere also means more plant life. There are already signs that the sahara desert is getting smaller.
The same thing is true of the religious apocolypse and redemption. God is not going to come and judge us. He is not going to take care of those that have wronged us. We have to manage that ourselves.