A planetary civilization or global civilization is a civilization of Type I on Kardashev scale, with energy consumption levels near that of a contemporary terrestrial civilization with an energy capability equivalent to the solar insolation on Earth. In social aspect the worldwide, global, increasingly interconnected, international, highlytechnological society.
in a work "Transmission of Information by Extraterrestrial Civilizations", published in 1964, proposed the scale of technological development of civilization, based on the amount of energy that civilization is able to utilize, then named Kardashev scale. A Type I civilization is planetary, consuming all energy that is available from a neighboring star, or about 1017 watts. A Type II civilization is stellar, consuming all the energy that their star emits, or 1027 watts. A type III civilization is galactic, consuming the energy of billions of stars, or about 1037 watts. Carl Sagan suggested defining intermediate values by interpolating and extrapolating, according to his calculations, the modern state of the present human civilization is expressed by a value about 0.7.
Transition to a planetary civilization
, in a book, Physics of the Future, published in 2011, stated that humans with an average economic growth may attain planetary civilization status in 100 years.
Danger of a transition to a planetary civilization
Michio Kaku, in his interview "Will Mankind Destroy Itself?" with the website "Big Think" discusses a danger of a transition to a planetary civilization. The danger period is now, because we still have the savagery, but we also have nuclear weapons:
Planetary civilizations are various civilizations we see in science fiction. Michio Kaku qualifies as one of a typical Type I civilization would be that of Buck Rogers or Flash Gordon, where an entire planet's energy resources have been developed. They can control all planetary sources of energy, so they might be able to control or modify the weatherat will, harness the power of a hurricane, or have cities on the oceans. Although they roam the heavens in rockets, their energy output is still largely confined to a planet.
On the Kardashev scale, the next status is a stellar civilization, a Type II on the scala, where a civilization consumes all the energy that their star emits, or about 1027 watts. Michio Kaku in the book "Physics of the Future" suggests that humans may attain stellar civilization status in a few thousand years.
