Signatures of Kardashev Type-0 Self-Destructive Civilizations

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Signatures of Kardashev Type-0 Self-Destructive Civilizations

"It is easier to detect signatures of intelligent civilizations that destroy themselves than to search for signs of advanced extraterrestrial civilizations that deliberately communicate their presence"

"the first evidence of extraterrestrial intelligence came to us from the remains of ill-fated civilizations; detection of a Type-0 self-destroyed civilization is however less probable than the destruction of a Type-0 civilization by a Type-I, or even a Type-II civilization; Type-II civilizations are capable of harnessing the energy radiated by its own star, and to use it to destroy less advanced civilizations in a way that is easier to detect than say, the typical Type-0 self-destruction strategy based solely on the detonation of nuclear weapons"

"Actually, the observational signatures of self destroyed Type-0 civilizations decay on short timescales so it is unlikely that we will observe them; what we expect is to observe self-destructive Type-I or Type-II civilizations; a typical scenario would be a solar system with two Type-I civilizations competing for their sun, one of them finally destroying the other"

"A Type-II civilization that wishes to create a Dyson sphere in a solar system with radius 1 AU would of necessity destroy planets in order to supply sufficient raw materials for the construction of such a megastructure; if those planets are inhabited by Type-0 or Type-I civilizations, they wouldn't stop; for a Type-II civilization destroying is a must if they wish access to the power comparable to the luminosity of the entire Milky Way galaxy"

"You just need a Type-0 naive-minded individual, like Carl Sagan, to send childish messages to the stars. Shouting in the jungle just attracts predators, but it might be you need to be Carl Sagan to ignore this fact. Should we knew all we know today about our neighbours, we wouldn't had created SETI".

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