Tribal societies have historically been failures. The lack of individualism and private property in communal living tribal environments squelches innovation. All dominant cultures in the world today are cultures that surpassed tribalism and embraced individualism. Classic examples include all of the indigenous tribal peoples of the Americas. They all pretty much died out, for a reason, and those who still embrace communal living and tribalism are among the poorest of this hemisphere. Western society embraced individualism and ditched tribalism and communal living with the advent of agriculture, which led to the greatest acceleration in technological advancement ever seen. Notice how easily the non-tribal non-communal western cultures took over this hemisphere. Within a small handful of generations the non-communal culture eviscerated the tribal communal culture from these continents. Another classic example of this is the original Thanksgiving story. When the colonists ditched their idealistic religious communal lifestyle and embraced individualism and private property their colony thrived.
Intentional communities can be fine though, but in my opinion they will never flourish nor will they produce anything innovative unless their basis for association is founded in individualism and anti-communalism--but then they aren't really communities anymore, or are they? The only working communal societies I know of in the world today are the Kibbutzim in Israel. And much of their profits are based on individuals who live in the kibbutz, yet work in the outside world in the non-communal society and return their profits to the kibbutz. They also function in a capitalist fashion with regards to the outside world, yet in a communal fashion inside the kibbutz, with the goal being to increase production and profits in order to benefit the collective. Unfortunately they never seem to be as efficient as non-communal companies.
Perhaps I am misunderstanding your question though, or am reading too much into it.
I have no interest in joining any kind of intentional community. I'd rather do my own thing on my own property and deal with other individuals on an individual basis.