It was never going to stop.

Hold up, now you're mixing in made up stuff with a few facts. Yes there is less glaciation since the last glacial maximum when there were huge ice sheets across continents. No it was not inevitable to continue retreating indefinitely without human intervention, that is simply not true at all.

There have been cycles of maxima/minima over the last few million years, and humans have likely contributed to a warmer period since the beginning of agriculture. But the most recent period of warming due to fossil fuel burning over the last few hundred years is way off the charts from historical trends