Why tribes and not nations? Basically, because nations reach the critical mass where Human control fails and the nations, sometimes horribly, collapse. Tribal structures are easier to control for Beings that have Evolved to where We are now.
It seems like “Tribal Social Structures” can stay within controllable parameters that are less harmful to the Individuals that comprise the population of Urth.
Also, tribal structures that are less stressful, in social terms, are easier to design and maintain for Evolutionary Progress, than nations. Nations tend to become hard to manage because of their size, not only in numbers of People, but also because of the tremendous aggregation of diverse cultural elements. (thinking of the current modern nations here).
Some Nations have demonstrated positive possibilities and realities in their handling through “Law” and “Education”, of diverse cultural elements. The United States of America is the leader in this set of cultural skills. But even this great nation, is experiencing the stresses of trying to harmonize, or even tolerate certain types of cultural diversity. And the main cultural economic structure, “Capitalism” has limitations that conflict with either “blending” or “sufficient harmonization” of the Many Kinds of People. The noble Democratic Intentions and Designs of The United States of America are being severely tested by too numerous and diversely cultural Individuals. Many see Civil War and, or, system collapse coming. If this happens then the stage will be automatically set to build new smaller tribal cultures…or a state of anarchy…probably both.
Our love of Freedom and Individuality is conflicting with Our Young Ideas of Fairness and Justice These cultural elements need rethinking and new systems incorporating and Balancing them, designed.
Smaller Tribal Structures could help with this big nation rehabilitation process. They can specialize in “Ways of Life” and maybe make sensible contributions to new nations…one building block at a time. Old Tribes, New Tribes, Alliances of Tribes and Confederations of Tribes can be stepping stones toward the Birth New and Better Nations. A “United Tribes Of America” anyone?
It is possible that New Tribes and their excellence (when this does come to pass) at stable social structures might come to be considered the better social structure designs and Nations will become a thing of the past.
Or, possibly, We will eventually learn what We need to know to make nations, even a Great Confederation Of Nations, a successful Human Endeavor.
We can do Good Tribalism, but just aren’t ready to build Good Nations yet. There are things to be gotten rid of and things to practice till We get it right.
All this keeping in Mind, that the ultimate goal is “Peace On Earth and Good Will Towards All Men and Women”.