If I had to choose between bubonic plague, Visigoths, Vandals, Huns, Persian and Muslim invaders, and the temperature getting 2 degrees cooler or warmer over 100 years (not that there is actually any proof of this), I would prefer the slightly cooler or warmer temperature. Below is a good textbook on the Byzantine empire. Oddly it never mentions climate change, because only a moron thinks climate change was anything but a trivial contributor to the advance or decline of any civilization that ever existed. Conversely, I guess climate change was a contributor to the advance of the Turks who conquered Constantinople in 1453, so Erdogan should want more of it. I wish I had a nickel for every idiotic statement made about the significance of climate change.
https://www.amazon.com/History-Byzantium-Timothy-Gregory/dp/140518471X
Climate change is 100% natural 100% of the time, and yet it has resulted in the series of replacement cultures and civilizations in Europe (including the British Isles), the Middle East, Asia, and even the Americas. That isn't trivial, nor am I a moron.
The biggest problem is not the small temperature changes, it is the sea level changes.