We have analyzed CrisiDB because there's plenty of data on weather proxies. ...Weather, climate worsening seems to serve often as a trigger for crisi… - Peter Turchin

In my book, Ages of Discord I talk about the Progressive Period... [the] 1920s especially. Remember... the original Red Scare was in the 1920s. So when we look at the existence of the Soviet Union, established in 1920 and collapsed in 1989, this is the period when... I grew up, by the way, in the Soviet Union, and I remember how the newspapers like were talking about the horrors of capitalism... There are multiple lines of evidence that show that the influence from the Soviet Union... By the way, also from during the 1930s. Those were, in fact, important influences on the Roosevelt administration in... designing an equitable system. ...When the Soviet Union ... collapsed, it was misinterpreted as the triumph of neoliberal economics... and here we are essentially. ...This is an important factor. So the failure by the elites. It could be both due to internal challenges... and by the way, in the 1920s there were challenges... even earlier from [the] 1890s... from the Populist movement in the United States, and the Socialist movement in the United States. ...So those were internal. There were also external influences from competitors such as the Soviet Union.

[W]e actually looked at outcomes of crises, measuring them by a collapse. I don't like the word "collapse" because who knows what collapse means. So... we broke it up into various dimensions, and then we can look at more than 100 cases in CrisisDB, and look at the distribution of the severity (where we basically sum of the possible bad things that can happen in societies). Most of the time the crises lead to pretty dire consequences, but there is about 10-15% of cases where the elites manage to pull together, adopt the right set of reforms, and sail the ship of the state through the turbulent waters without major bloodshed.

[W]hen a state... has stagnating or declining ... a growing gap between the rich and poor, overproduction of young graduates with advanced degrees, declining public trust, and exploding public debt... Historically such developments have served as leading indicators of political instability. In the United States all of these... started to take an ominous turn in the 1970s. The data pointed to... around 2020... a spike in political instability. And here we are.