The Kardashev Scale is a logarithmic rating for a civilization's development or technology, used to hypothesize about alien civilizations or make predictions about our own future advancement.
Kurzgesagt
Cool Worlds
Isaac Arthur
Modified Kardashev Scale, based on Watts: In case the above formatting is broken: K = (log(W) - 7.38) / 9.73
Nuclear, solar -> only ways to Type I1
Heat dissipation becomes a huge issue for Type I civilization, inevitably.1 Regardless of the greenhouse effect, any planet increasing its energy use must get hotter.
Solar power on earth is limited by the Carnot Limit to ~68.7% efficiency.1 A more realistic limit is 30% efficiency.
The Kardashev Scale
Based on this, I propose population scales and a modified Kardashev Scale for local governments/systems/collections of systems. Of course.. that doesn't apply as well with FTL travel being commonplace.