“As we progress along the Kardashev Scale, energy harnessed on Earth will increase a hundredfold and will mostly be solar aka fusion aka starlight. Then energy harnessed will increase perhaps a billionfold if we make it to Kardashev II, with space solar power, and another [@JessePeltan] A lot of people say we don't need more energy. We can simply use less and be more efficient. The 6.3x difference in GDP/kWh between Ireland and Qatar seems to support that, until you notice: - Ireland's energy use per capita is still 1.7x the global average - Ireland is a tax”