Central to the world is the caste and House system the Empire lives by. The Imperial City is ruled by the house of the Emperor, House Sun. Each of the big houses in the Empire has their own district, in which their lesser houses are welcome. The population is also divided into the nobles and the peasants, and with civilization living tightly within this system and people being tattooed by law with their caste and house marks, escaping to a higher station seems impossible.
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