In order to advance their kingdom, players are expected to pay Infrastructure Points (or INF) in order to do so.
Kingdom traits grant a single stat upgrade, and allow the kingdom to take special actions or grants special effects. The kingdom can have multiple traits, but only chooses one to gain a stat increase from.
Kingdoms can have up to four traits at character creation. Some traits can be taken multiple times, granting different "Tiers" to the trait. These additional tiers take up slots as if they are a new trait.