Catastrophe on Earth: the Starting Point for Human Beings to Enter the Interstellar World

Hard science fiction. Facing the coming malicious alien civilization, the guardians of the earth chose a successor in human society to resist the alien civilization. No matter how tortuous the process is, mankind will thrive as a result and gradually move toward interstellar civilization. This article stands within the scope of existing scientific understanding and imagines the future development technologies of various levels of scientific and technological civilization, in order to make readers smile.