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I agree there was a global Medieval Warm Period. The revisionists claim that it was local, e.g. northern Europe only. They do the same thing with the Little Ice Age. But assuming that MWP was global and about 1C or so, that would result in a total of 5-10 ppm rise in CO2 with many centuries of lag. That means about 5-10 ppm of the recent/current rise in CO2 comes from the MWP.

But the current rise is 2-3 ppm per year. That means it has a different source than the MWP, or in other words, only a small portion of that 2-3 ppm per year is a lagging effect of the MWP.

The earliest fossils of anatomically modern humans are from the Middle Paleolithic, about 200,000 years ago such as the Omo remains of Ethiopia, the fossils of Herto sometimes classified as Homo sapiens idaltu also from Ethiopia.

We only have 11 years left...RIGHT

It is hard to keep the big picture in mind when misinformation is flooding in from all around. It was much warmer than it is now during both the Medieval Warm period and the Roman Warm Period from approximately 250 BC to 400 AD. 1 degree C does not cut the mustard when grapes were being grown in Northern England and there were crops being grown in Greenland and Iceland that cannot be grown there even now. On a shorter time scale, there is overwhelming evidence that it was warmer in the 1930s than it is now.

As far as CO2 goes... it has been multiple times greater in previous time periods with none of the predicted end of the world scenarios taking place. The truly scary threat to life on this planet occurs not in warm times with abundant CO2 but during cold periods when CO2 has been depleted to the point where it has threatened the health of plant life.