Guilds are an ancestral form of economic organisation. Despite falling out of favour in the entire world, they still exist in Oceanyka as a middle way between corporations and cooperatives/syndicates. They do have a bit more going on though. Because they are so united but unideological, guilds have several controversial tactics that they themselves call "pragmatic". For example, violence against other guilds and sabotage are not unheard of. Plus many guilds are extremely protective of their crafts and refuse to share many secrets.
