Each character comes from a particular Civilization. In game terms, a Civilization passes on a set of beliefs and benefits to each of its citizens. More fundamentally, it is your character’s home.
Check with your GM to see what Civilizations are available.
If you pick an existing Civilization, write down its Core Values and special benefit on your character sheet. You typically lose access to that benefit if the ratings of those Core Values drop to zero.
If you invent your own civilization, take a few moments to consider your character’s home world and other worlds in that civilization. You should pick up to three of your Core Values that link you to your Civilization. You may also choose to state that your Neuroform is typical for those in your Civilization, or to have your character be considered unusual. Finally, you may choose a benefit that all members of your Civilization enjoy: competitive advantage in a single Capability, two extra Twists at the beginning of each session for use with a particular Theme, or an extra Core Value. If you have an idea for a more unusual benefit, check with your GM.