Thank you, never heard of Dunbar´s number... Things like this i´m looking for.
It makes sense to me that a group only can be stable if everyone knows everyone.
Then even the currency system has a potetial solution. a "fei lun" like system.
Its a kind of biological blockchain :)
Know we just need a way to interact with other groups without "clanwars" an were done.
easy peasy xD