It was COOLING not warming that caused that distress to humankind.
It was not
cooling per se that harmed humanity, but decline of agricultural production due to cooling. It would have helped if you read that paper
Precipitation patterns are changing, so it’s guaranteed that agricultural production will drop in some regions. As I said ealier, I do not believe in AGW causing a
global food shortage, because it will defreeze a lot currently of unusable land in Russia and North America.
But, some regions will suffer. If a country faced with AGW-induced drop in agricultural production also happened to have an economy based on food production (which means most of the Third World), then the situation gets really nasty: no domestic food production and no other products which can be traded for food equals famine. Faced with such prospects, the local government can follow the time-honored tradition and decide to rob the neighboring country.
Again, recall river Jordan: the flow dropped by 90% over the last 50 years. Some of that was due to decreasing rainfall. So humans countered by using increasingly sophisticated irrigation systems. However, an increasingly effective irrigation drains
more water from the river, furthering the water deficit (for those downstream). This is the dreaded positive feedback loop: an attempt to counter the problem actually makes it worse. So the situation over there today is that Palestinian people have trouble getting the water to drink, because it is being diverted to support (economically unviable) Israeli agriculture.
Since the region is extremely volatile for religious and political reasons, this is a ticking bomb waiting to go off.
Re: my linking of Revelation of global warming, if you researched the matter you’d know that there is a view in Islamic culture that the Revelation / Qu’ran story about Gog and Magog drinking water is a prophecy about a the Israeli / Palestinian conflict over water. Mind you, it does not matter what the prophecy actually describes, if the people believe that it applies to them, they will think they are doing their divine duty. See e.g. this
alimuddin.blogspot.com/2009/03/sign-sea-of-galilee.html