It kind of always was if you look at climate history.

One of the other inconvient truths of life is that we humans were born into a rare and unstable climate. All human civilization happens just in this little Interglacial window of nice climate, but it's kind of always rapidly warmer or cooling with the transitions in and out of the Interglacial being brutal.

Humans sped up climate change, but it was going to happen either way. That's mostly why 99% of all life has been killed off by climate change. Not just from meteors and supervolcanos, but even just the never stable no real balance climate Earth always produces.

We tend to like to think there is some equilibrium and like if we are goo to the planet it will reward us with stability, but that's some very serious wishful thinking once you look at nice cores and glacification cycles ever 100k years with only 20k of climate even close to what we have now.

Humans always had to learn to control Earths climate or face mass death. We made it all worse, but the earth mostly plans to kill us like the other 99%.

The humans who lived through the last glacial period and almost went extinct understood this better than we do now because they saw the much longer and more brutal side of what Earths climate really looks like.

The to make it worse humans need an Ice Age to have the climate they evolved in..and ice ages are rare. about 70% of Earth's existence since complex life is Greenhouse Earth with no polar ice year round or what I call Dino temperatures.

Dinosaurs seems to get a far more stable climat than we did, but not one good for warm blooded big brains that literally need a cooler climate for the big brains to no overheat.

We can turn food to heat, but we can't turn food into cooling so we are screwed for the most common climate the planet produces.

Feel better now?