So, our rat culture. This is just a proposal. Please feel free to ask for adjustments or give me a poke and say it's too early.

I'm having fun with this at the moment.
[] Plan: C&D
-[] Culture/People Name: Virtuous Skaven
-[] Names:2 names. First name descriptive, second name Arabic
-[] Architecture: Elaborate underground areas, with curving structures reminiscent of of Arabic. Above ground structures are typically cloth tents.
-[] Cultural Behavior: Skaven are energetic, flighty, and extremely curious about all things. They love puzzles and mysteries, and it's considered a great gift to give someone one of them, solved or not. It is only when they become serious that they lose their yes-yes attitude and turn into, do it now-now.
-[] Government: The Skaven are governed by a council made up of leaders appointed by the clans that make up their society. This council will delegate leadership to various other people as appropriate, giving them extreme authority to carry out their task.
-[] Racial Purpose: The Skaven as a race has been formed to counter potential magical or corruptive threats. Since these threats can be subtle and variable, their society has a rather broad non-combat focus in their initial societal formation. The hope is that they will seek out, identify, and resolve problems without external help.
-[] Clan Structure: Skaven form clans that have an extreme focus on a narrow range of tasks. A clan may be formed or dissolved at any point, but will only be invited to the council once they've been judged to be unique and accomplished enough to contribute to the greater whole. Clan members may switch between clans at will, and arranged marriages and the like between clans are encouraged to keep some measure of peace. Clans are free to manage their internal structure as they see fit, provided they stay with the laws. There are five 'sacred clans' that must always exist and be part of the council.
--[] Clan Scribes: Responsible for recording and retaining knowledge, the scribes are allowed to access all other clan secrets, though they must keep them secret so long as the clan exists unless requested otherwise. The scribes are meant to provide backup and prevent the loss of knowledge. They also have the knowledge of demons / elementals and can theoretically summon / bind / contain those beings as necessary, though that information is restricted to the greatest of them.
--[] Clan Entertainers: Responsible for entertaining the populace. The entertainers are there to ease the inevitable tensions between the skaven and allow for civility to be maintained or retained. They also monitor the populace for subversion, and function as counterintelligence. They have a secret art called 'silk blade dancing' which is a martial art that is specifically used by dancers to prevent harm to their peoples if necessary. This art can be concealed within standard dancer attire and is a rather artistic and defensive style.
--[] Clan Science: The discoverers. The science clan exists to explore the universe, finding mysteries, and discovering things. Out of all the clans they alone will always have their findings published and are encouraged to found other clans to basically play engineer to their scientist. They have been taught how to use extremely volatile and dangerous elements, including warpstone, and know how to use it safely, and dispose of it as well. It is considered a sacred calling to maintain, preserve, and cleanse the enviornment.
--[] Clan Assassins: This clan practices the art of killing. They eliminate criminals and threats. The best fight in their opinion is one that never happens at all, and they strive to do so. Their secret lore is the lore of how to kill mages, and their best strive to be undetectable by anything. When not killing Assassins can function as bodyguards, identifying threats and removing them before they become dangerous. Something unkillable is considered a challenge to this clan.
--[] Clan Healers: To heal is this clan's goal. They are focus on non-magical healing in all respects, and while they don't disdain it, they try to avoid it where possible. The most hospitable clan, they will heal anyone that needs it, so long as they are not a threat to them and theirs. They also have the lore of how to purge mutations and corruptions, though this is not pleasant to the subject, and can kill their patient.