Most discussion in longtermism centers around preserving humanity's future, but it is also important that we think about what humanity's future should look like. For example, assuming we develop into a Type III civilization, what should our values and priorities be such that we make the best possible society in a galactic context? I haven't seen any discussion of these questions, the closest I've seen is people talking about value lock-in as an existential threat.
Does anyone know if there are any books or post series on the topic? I'm considering writing a book on it myself, and I'm curious how neglected it is/how much work has already been done.