A planetary civilization or global civilization is a

civilization A civilization (or civilisation) is any complex society characterized by the development of a state, social stratification, urbanization, and symbolic systems of communication beyond natural spoken language (namely, a writing system). C ...

of Type I on the Kardashev scale. This type of civilization is likely to be reliant on renewable energy sources such as stellar power, as well as powerful

non-renewable A non-renewable resource (also called a finite resource) is a natural resource that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption. An example is carbon-based fossil fuels. The original organic mat ...

sources such as nuclear fusion. A Type I civilization's energy consumption level is roughly equivalent to the solar insolation on

Earth Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surf ...

(between 10¹⁶ and 10¹⁷ watts) ─ around 3 orders of magnitude higher than that of contemporary humanity (around 2×10¹³ as of 2020).

Planetary civilization – Type I civilization on Kardashev scale

Soviet astronomer Nikolai Kardashev, in his 1964 paper titled "Transmission of Information by Extraterrestrial Civilizations", proposed a scale intended to measure the level of technological development of civilizations based on the amount of energy that they are able to utilize, eponymously named the Kardashev scale. A Type I civilization is planetary, consuming all energy that reaches its home planet from its parent star, equivalent to about 10¹⁷ watts in the case of Earth. Carl Sagan suggested defining intermediate values (not considered in Kardashev's original scale) by

interpolating In the mathematics, mathematical field of numerical analysis, interpolation is a type of estimation, a method of constructing (finding) new data points based on the range of a discrete set of known data points. In engineering and science, one ...

and

extrapolating In mathematics, extrapolation is a type of estimation, beyond the original observation range, of the value of a variable on the basis of its relationship with another variable. It is similar to interpolation, which produces estimates between know ...

the commonly used values for the energy consumption levels of types I (10¹⁶ W), II (10²⁶ W) and III (10³⁶ W). According to Sagan's extended model, modern-day humanity is describable as a Type 0.73 civilization as of 2020.

Transition to a planetary civilization

Theoretical physicist Michio Kaku, in his book '' Physics of the Future'', published in 2011, stated that, assuming sustained economic growth, humanity may attain planetary civilization status in 100 years.

Danger

Michio Kaku, in his interview "Will Mankind Destroy Itself?" for " Big Think", discussed one possible danger of the transition to a planetary civilization:

In science fiction

Many futuristic civilizations seen in

science fiction Science fiction (sometimes shortened to Sci-Fi or SF) is a genre of speculative fiction which typically deals with imagination, imaginative and futuristic concepts such as advanced science and technology, space exploration, time travel, Paral ...

are planetary civilizations. According to Michio Kaku, 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 the planetary sources of energy, so they might be able to control or modify weather at will, harness the power of a hurricane, and build cities on oceans. Nonetheless, their energy output is still largely confined to their home planet.

Next status – stellar civilization

On the Kardashev scale, the next status (Type II) is a stellar civilization, a civilization that consumes all the energy that its parent star emits, or about 10²⁷ watts. Michio Kaku suggests in the book " Physics of the Future" that humanity may attain stellar civilization status in a few thousand years.

References

External links

{{Wikiquote
Description of civilization types from Dr. Michio Kaku
Energy development Space colonization Global citizenship