>>16154454>Since I was a kid I've been weirdly fascinated by mining, bunkers, tunnels, etc. I wonder sometimes if this was our purpose.>>16154452>I don´t know why but I have this impulse on going underground. To explore/live underground.I think probably all advanced civilizations move underground, as a security measure. They would leave "wild" people on the surface to be picked up by slavers. It would go on like that until the underground civilization attains the means to fortify their entire planet or solar system, which is probably difficult.
