"Salina, back up all our current technology for the nation."
Since Peter Brown had decided to give away some of the technology, he didn't think about retaining the existing one. After returning home, he gave Salina a directive.
Having completed this task, Peter sat there pondering his next steps. Even though he had handed over the technology, he knew in his heart that, given Earth's current situation, the likelihood of withstanding the powerful enemy that was approaching wasn't great.
At that moment, Peter started thinking about defensive measures.
After some thought, Peter believed that constructing a large spacecraft wouldn't be of much significance. For Earth, it was enough to ensure it wouldn't be overtaken by extraterrestrial foes.