The Kardashev scale is a method of measuring a civilization’s level of technological advancement based on the amount of energy it is able to use. The measure was proposed by Soviet astronomer Nikolai Kardashev in 1964.The scale is hypothetical, and regards energy consumption on a cosmic scale.
Kardashev’s has given rise to numerous scenarios exploring the possibility of more evolved civilizations. These scenarios each question in their own way, defining a civilization: energy sources, technology and the transmission of interstellar messages.
The purpose of this classification is to guide the search for extraterrestrial civilizations, particularly within SETI, in which Kardashev participated, and this on the assumption that a fraction of the energy used by each type is intended to communicate with other civilizations.
To make this scale more understandable, they compare the speed of transmission across the galaxy of a volume of information equivalent to a medium-sized library.
A type 2 civilization can send this data by means of a transmission beam emitting for only 100 seconds. A similar amount of information can be sent across intergalactic distances of about ten million light years, with a transmission time of several weeks.
A type 3 civilization can transmit this same amount of data to the entire observable universe with a transmission time of 3 seconds.
Kardashev believes that it will take humanity 3,200 years to reach Type 2, and 5,800 years to reach Type 3, but physicist and futurist Michio Kaku suggested that, if humans increase their energy consumption at an average rate of 3 percent each year, they may attain Type 1 status in 100–200 years, Type 2 status in a few thousand years, and Type 3 status in 100,000 to a million years.
A Type I civilization is usually defined as one that can harness all the energy that reaches its home planet from its parent star.
A Type 2 civilization is capable of harnessing the energy radiated by its own star, or example, by means of the successful completion of a Dyson sphere or Matrioshka brain.
Note 1: A Dyson sphere is a hypothetical megastructure that completely encompasses a star and captures a large percentage of its solar power output.
Note 2: A Matrioshka brain is a hypothetical megastructure of immense computational capacity powered by a Dyson sphere. It is an example of a class-B stellar engine, employing the entire energy output of a star to drive computer systems.
A Type 3 civilization is in possession of energy at the scale of its own galaxy. Civilizations of this type as having access to power comparable to the luminosity of the entire Milky Way galaxy.
A Type 4 civilization can control or use the entire universe while a Type 5 civilization can control collections of universes as well as there is a Type 6 multidimensional civilization and a Type 7 creator civilization what is discussed in the video below.
At the current time, humanity has not yet reached Type 1 civilization status, we are only at level 0.72