Loved that book. Mike Duncan covers this too in his podcast. He really discusses this at length in the French and Russian Revolutions. Terrible harvests because of horrible winters were likely a major factor in causing some of the issues which led to the French Revolution. The February Revolution probably doesn’t happen if it wasn’t such a nice day outside and everyone decided to get into the streets, where it just so happened that the International Working Women’s march was happening. Two of the biggest events of the last 250 years, both significantly influenced by weather.

https://time.com/6107671/french-revolution-history-climate/