There was no ice at the pole when the dinosaurs ran around, the climate in what is now Alaska was like the Pacific Northwest today.
And until Antarctic was surrounded by ocean to act as a barrier of cold water and cold air currents to turn the continent into an ice box, it was more like the tundra today than the miles thick ice it currently has.
That corresponded with the rise of the Himalayas, whose weathering pulled a lot of CO2 out of the atmosphere.
End result? The planet shifted from tropical everywhere but far north and south to ice age cycles every 100K years. And in the warm period, it is rarely more than a degree or two F warmer than today, but it is often three to five degrees cooler - and the ice ages are ten or so degrees colder than today.
In short, we are around 10 degrees F (or more) below Earth’s historic (40 million years plus) normal temperature.
And we are several degrees above its 40-million year shift to cold, if you average in the ice ages.
And while there are disruptions, the planet has survived much warmer AND much colder.
When I ask liberal coworkers if they know what an interglacial warming period is, they look at me like I am speaking to them in the Martian language.
Come on ice age! Us folks on the Mississippi Gulf Coast will be living in paradise!