Recently, some scientists have studied the impact of climate change on human society in history. They found that more than 80% of the world's countries and regions had twice as many wars in cold climates as in warm periods; in China, wars, widespread unrest and dynasty replacement over the past 1000 years mostly corresponded to particularly long cold periods; there was a close link between Europe's Little Ice Age from 1550 to 1850 and witch hunts in European history and even the French Revolution. As a result, they concluded that cooling climate will lead to social conflicts and dynasty replacement.
The statement "Climate change is always happening, social conflicts, and dynasties are always happening. Things that change together do not necessarily have a causal connection" would most question the above-mentioned scientist's point of view.