It would be more apt to say these were a people half asleep than undead. This is a town of humans living on ancient earth. Anyone who has felt this earth breathe and bleed with them has special privileges. 

It’s because of the ghosts. The undead couldn’t interact with the living without some unnatural effect. Bathe in any dirt blessed by these supernatural beings and you’ll find yourself unable to feel, but immortal. And it’s not just the earth that’s been blessed. We do not call the sunless sky the night or dark. We say it is alive. 

This is the reason we say the moon and stars are for the poor: what could never leave you deprives you of the urgency to enrich yourself. It’s smart to invest in a star that hides away; as, the next season, or even day, it would come back much brighter. You’d never say the sun would wake with his eyes still half-shut; so still his light shines unfaded.