It is coming, its just a matter of when.
Unless we have left the Quaternary - a geologic age of cyclic continental ice sheets. (Note cyclic means they repeat !) I see no physical evidence for that! So we left a glaciation some 20-25K years ago we will enter another at some point. It doesn’t matter how much we pollute or don’t pollute, how much governments spend or don’t spend. Old Man Sol’s variability, cosmic ray showers, Mother Earth’s continental drift & other geologic activity are completely indifferent!
It would be interesting if the archaeologists could find some PRE-ICE AGE, the last one, remnants of civilization that was wiped out by the great ice sheets....................