As you may know, the earth has been generally cooling for the last 50 million years and during the last 3-5 million years.
Also over the last 11,000 years - the current interglacial period began 12,000 years ago. There has been a cycle with a period of about 1,000 years, with most (not all) peaks being cooler than the previous peak and most bottoms being cooler than the previous bottom. ALL peaks - including the current temperature which may or may not be a peak - have been cooler than the second previous peak.
The prior interglacial period shows a similar pattern.
If the current interglacial ends, we can expect the global mean temperature to drop by 4-7 degrees celsius over a few hundred years. If the current ice age ends, we can expect a similar rise. This is based on what appears to have happened in regard to prior interglacials and ice ages, and therefore due to causes beyond human control (and, possibly, mentionable human influence).