First rule, the demons make the rules.
I have heard rumours that the world wasn’t all the bad, that before the demons came, the world was peaceful in some areas. That all changed when an angel realised all the monsters for purgatory, the demons came to keep the monsters under control, but they took over our world instead. Now if a human breaks Lucifer’s rules we are punished. Also the demons are second in command, so if one saves your life you become their slave, but most demons hate humans.
The rules that humans must follow
Rule one: No humans are allowed to talk back to the king (Lucifer) or any demons.
Rule two: The human population has to be within 1,000,000 people per country.
Rule three: Humans must work 14 hours a day min.
Rule four: If a demon or and one related to the king saves your like, you become their slave until you die or until they release you from command.
Rule five: If any human looks or attacks a demon without cause, that demon can decide whether to kill you or not.
Punishment for disobeying any of these crimes is death.