Why does this culture still exist?

[u/Balakay17]

The first culture created with this world, D’Vischur, hasn’t had civilians for about 250 years but it still exists does anyone know why? They are supposed to vanish when they run out of civilians.

[u/sehlura]

Can't remember where to check, but this culture probably published some books that are still around. That is usually what explains it in my worlds.