I have the view that there is nothing I can read that is so remote that it is not immediately useful. I recently read a history of the Ukraine, which is fabulously complicated, and the reading suggested that I should try a history of he holy roman empire, about which I knew nothing.
The story is that you have the Roman empire, and then its fragments in new states (this took a while)say 300bc and on through the treaty of Westphalia, and the Holy Roman empire 400 to 1800, running much of the time in parallel. Both sides had leaders, kings and emperors, and ruled over the same land but with different functions (often competing.
This suggests to me that one way to handle climate issues, since there seems no path within current governance world wide, might be to create a parallel government that claims to deal with the climate issues and the economy and proposes a different model of how to proceed, The hope would be that this new government, lets call it plan B. So we might have the alpha government and the beta government in a struggle for legitimacy, that begins to get people who are eager to sign up to be citizens in it and this idea catches on. We then have new structures fir leverage.
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The Gates of Europe: a history of the Ukraine Peter Wilson
The Heart of Europe, A history of the Holy Roman Empire, Serhii Plokhy