Presumably you are assuming that societies judge their values by their values, always coming to the answer "we're good". But societies can do better and worse at realising their values. Movoer, socieites can judge moral values by non moral values, for instance by consistency. (Yudkowsky's habit, aparently copied by Bostrom, of refusing to distingusih moral value from non-moral value, causes problems, inasmuch as making the distinction solves problems).

I am not sure putting your values into practice counts as a moral value.