Interesting to read about the history of reserve currencies... it's logic reminded me of the PhD research "On the Thermodynamics of War and Social Evolution".

https://www.researchgate.net/publication/332523167_On_the_Thermodynamics_of_War_and_Social_Evolution

https://global4cast.org/2019/04/on-the-thermodynamics-of-war-and-social-evolution/