Reaching the edge of a Level 1 civilization, one can fully utilize all the resources of a planet, including and not limited to the radiation from a Constant Star reaching the vicinity of the planet, core energy, controlled nuclear fusion, etc. Humans can complete the development of neighboring planets within the Constant Star System and enable artificial machines to reach one percent of the speed of light.
A fully developed Second Level civilization can already leave the Constant Star System to explore broader spaces.
A Second Level civilization without Jump Technology needs to spend thousands of years on long voyages to reach nearby planets. Due to the stretching of time and space, the ideology of human civilization will undergo earth-shattering changes compared to planetary civilization.
A perfect third-level civilization has reached the edge of dimensional ascension, which is also the endpoint for most intelligent civilizations in the Milky Way that once perished.
