Guilds

 Around the table the players have gathered, now the PCs gather together for a shared purpose.

Each guild playbook gives PCs a reason for being together.  Bonds are built during character creation and then a guild is chosen that brings the PCs together in an intentionally designed way.  By selecting a guild, your PCs will have different capabilities available.  Plus there's the added benefit of expanding and growing your guild, just like "leveling up" your character.  Each guild is unique and brings it's own identity to the table and brings the players into a more shared creation of community.