In the early stages of the war, mankind's war mentality had not yet become so extreme.
However, throughout this century, as the course of the war deepened, mankind's strategic priorities have gradually shifted from destroying enemy ships to focusing primarily on gathering information, trading military strength for more information.
At the same time, in order to gradually increase the survival chances of escape fleets, and make it more difficult for the Compound-Eyed Observers to pursue, mankind began to increasingly adopt the policy of decentralization.
Some escape vessels even have a population consisting of only one family, and in the event of an emergency, each person would be able to pilot a small escape time machine separately.
Each individual escape time machine is also equipped with 20 frozen embryos, 10 male and 10 female.
This is the minimum standard for ensuring no inbreeding within three generations.