1, the primary civilization, it is a pity that the scientific and technological level of human beings has reached this stage, which is the so-called planetary civilization. It can break through the gravitational bondage of its own planet and initially explore and colonize the planets in the star system. Medical technology can cure the known diseases of human beings, basically master the laws of cosmic physics and chemical elements in this galaxy, and initially realize the nuclear polymerization ability of energy development.
2. The second level of civilization, the level of science and technology imaginable in film and television works reaches this level, that is, the so-called stellar civilization, which will use the energy of stars as the energy for space exploration. The emergence of warp drive can explore the outside of the star system, reach other star systems, begin to implant smart chips into the human body to strengthen the ontology, and begin to contact other alien civilizations with the same civilization level, trying to explore four-dimensional space.
3. The third-level civilization has reached the peak of its dimension at this level of science and technology, which is called Galactic Civilization. We can start space-time travel for interstellar travel, understand that black holes master multidimensional space, get in touch with higher civilizations of other galaxies, become a member of the galaxy civilization alliance, develop and modify DNA information to strengthen ontology, and at the same time, the demand for scarce element resources rises sharply, which will lead to conflicts with other hostile civilizations.