It stands to reason that the Demarchist government around Yellowstone might have represented the peak of human "freedom" as it were, because you had the OPTION of how you wanted to live your life and under what rules. The only other civilization that comes close to that optimization is the Culture, although if it weren't for the Minds it would all come crumbling down.
If you think about it logically, the Conjoiners were actually a side step in a progressive governmental evolution. All the citizens joined together in a loose hive mind is just the next stage of Demarchy, similar to the connection via Affinity shared by Peter F. Hamilton's Edenists.