civilization was proposed by former Soviet astronomer Nikolai Kardashev in 1964. The classification standard for how much energy civilization can use is divided into three levels. The first-level civilization can fully grasp all the energy of the planet, the second-level civilization can master all the energy of the star system , and the third-level civilization can master all the energy of the large galaxy. Since this is the hierarchical division method proposed by Kardashev, it is generally called "Kardashev civilization level"
According to the Kardashev civilization level, human civilization is currently only 0.73 level, which is still a long way from level one, because in the current energy system, oil and natural gas account for a considerable proportion, while the nuclear fusion element in the entire Earth's ocean has not been used. In the final analysis, the controllable nuclear fusion technology has not been broken through, so that human civilization has not been able to reach a level one civilization.
The only classification standard for civilization level is energy level. The history of the development of human civilization is actually also the history of the progress of energy level. From thatched wood at the beginning to coal later to oil and natural gas now, the progress of energy has directly led to the progress of human living standards.
Our home star Earth has a huge amount of resources, but our current technology can only develop 73%. If we want to fully develop the earth's resources, materials science first needs to make major breakthroughs. A new material with many advantages and cheapness can completely drive the development of all other industries.
According to the timetable for the breakthrough of controlled nuclear fusion before 2050, humans will be able to put controlled nuclear fusion technology into commercial applications by the end of this century, and at least they can use it to generate electricity. Therefore, by the end of this century, we will become a first-level civilization, and then spend hundreds of years to fill the solar system and become a second-level civilization
