I don't know why each time on topics about Advanced Civilizations they mention Kardashev Scale, species of types I, II, etc. ? All those energy-centric speculative ideas are simply stupid. "Civilization" is modern concept and it's not isomorphic to "Intelligence" nor intelligence is a long-preserved property of any system per se. What we know so far is Nature allows to exist systems that can show some unusual (statistically speaking) properties, although connecting those to necessarily "interesting" information-processing formations is IMO wrong. Even AI (eq. AGI) is possibly a short-term phenomenon - who knows if "smart matter" or "smart energy" can ever be distinguishable from their "dark" pairs.