Musk picks the one metric that happens to justify his own businesses. Energy harnessed is "objective" the way any vanity number is.
By Kardashev logic a civilization burning its planet fastest scores highest; efficiency, resilience, what the power is actually for, all vanish. It's a progress scale that conveniently points straight at rockets and solar farms.
Elon Musk: A very objective way to measure the progress of a civilization is: how much power has that civilization been able to harness?
The Kardashev scale is useful for this:
• Type I: how much of your planet’s power you can use.
• Type II: how much of your star’s power you can use.
• Type III: how much of your galaxy’s power you can use
Right now, we’re very low even on Type I, and we’re basically harnessing almost none of the Sun’s power
The Sun is enormous. It’s about 99.86% of all the mass in the solar system. Most of what’s left 0.14% is Jupiter. Earth is basically in the tiny miscellaneous category - a dust mote compared to the Sun
The solar energy hitting Earth’s cross-section is roughly half a billionth of the Sun’s total output. And most of that is hard to use, because Earth is about 70% water, and large land areas like Antarctica, Siberia, and northern Canada are not ideal for solar power
So if you want to harness any meaningful percentage of the Sun’s energy, you have to go to space
Even reaching one millionth of the power output of the Sun - a “microsol” - would be an epic achievement compared with where we are now