Each settlement has six core traits that determine it's play:
Traits are assigned at mint, but can be re-rolled. Every Settler has five chances to randomize their traits and be assigned a new civilization. This is not free though, as the Settlement's Realm will move to the next one on the list!
Settlers should be mindful of this, as every turn changes the realm you belong to! This may have unintended consequences for Resource production...
A Settlement makes it's home in one of six realms, starting in Genesis. If the Settlement owner decides to re-roll the Core Traits, the Settlement will also move realms to the next on the list.