“A civilization only has a fixed location in her infancy. Planets and stars are unstable and change. The civilization must then move. By the time she becomes a young woman, she has already moved multiple times. Then they will make this discovery: no planetary environment is as stable as a sealed spaceship. So they’ll make spaceships their home, and planets will just be places where they sojourn. Thus, any civilization that has reached adulthood will be a starfaring civilization, permanently wandering through the cosmos. The spaceship is her home. Where are we from? We come from the ships.”
