>"If humans do someday migrate outward toward the stars, our narrative space will move like an expanding wave before us, a vanguard of the imagination."
What reason is there to think that "narrative space" has to expand when a species becomes space-faring?
>"Our need for stories that help us find our way is too important to be left behind."
Why?
Are species or cultures that don't need stories somehow inferior?
Do we really need stories?
>"Knowing where you are in the world is fundamental to knowing who you are"
How do you measure "knowing who you are"? Are people who "know", better or more human than people who don't?
How can anyone claim that anyone "knows where they are"? How many people could point their exact location on a galactic map? (Less than one in a million?)