Will Future Civilizations Really Harness the Energy of Stars?

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The discussion centers on the Kardashev scale, a classification system for future civilizations based on their energy consumption, proposed by physicist Nikolai Kardashev in the 1960s. This scale categorizes civilizations into three types: Type I harnesses planetary energy, Type II utilizes stellar energy, and Type III taps into galactic energy. Supporters, including physicist Michio Kaku, argue that as civilizations advance, their energy output will increase, correlating with economic growth. A counterargument arises from an individual who dismisses the Kardashev theory, suggesting that future civilizations should aim to reduce energy consumption to the equivalent of a double A battery, which contradicts established scientific principles like the conservation of energy. This person claims Kardashev's ideas are mere science fiction and disparages other physicists who support the scale. The thread seeks knowledgeable participants to refute this perspective and defend the validity of the Kardashev scale against the claims of the detractor.
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Future civilizations have been categorized by the physicist Nikolei Kardashev in the 1960s by the the type 1, 2, and 3 rating system which you have probably heard of.

The Kardashev categorization for future civilizations makes sense to me, and it appears that other physicists agree on the rating system. The rating is straightforward in that it assumes future civilizations will continue to use and make more energy as they scale larger in economic output. Dr. Michio Kaku states in his book, Parallel Worlds, that we can monitor a civilization's energy output by looking at their gross domestic product.

Eventually they exhaust oil energy and scale towards planetary energy, and eventually towards the energy of stars.

Well, I am asking for your help in this argument, a debunking of his theory, if you will, because a common internet know-it-all claims that this is complete BS. This guy is claiming that civilizations will not reach for the stars in the future, but should use less and less energy, not more and more. He has stated civilizations in the future should only use the energy of a double A battery. It's as if somehow free energy and work will be given off somehow in the future, which would seemingly violate laws of conservation.

This guy snaps on people who attempt to debate any scientific information. He attempts to be the most knowledgeable "scientist" there ever was, on a daily basis. He is claiming that the Soviet physicist Kardashev was just some fool making up science fiction to publish a paper. I know, like anyone can just publish a scientific paper, and have it followed by numerous credible physicists while the theory is simply made up nonsense.

This thread at the other forum started as energy discussion, and user "Zlander" appears to have taken over again stating that other physicists are just morons, like Kardashev.

Could someone skilled enough in this area please join and debunk this guy once and for all? Maybe disproving his "double A battery theory" as a viable solution for future civilizations?
 
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