I would use the word diversity opposed to inequality (this word has gained too many negative connotations) personal preference. However, you said:
"there is no political system where all benefit"
Assuming that our barbaric system of exploitation of others is somehow natural and there is nothing we can do about it... (What I gathered from your article, correct me if I'm wrong)
"Give me one example then."
I could find several examples for you, as there are plenty of cultures outside our dominant paradigm (some existing today and many far gone). However, one will do.
The !kung:
It is possible to create political systems that equally benefit people. Even though people are born diverse(unequal) they can still be brought up in a system that is equitable.
I find too often that excuse of "human behavior", to justify our paradigms systems. Just because it has been the leading narrative of our dominant culture (from where our 'research' is conducted. Noting that this research fast falls apart in other human societies) as far back as recorded history goes.
This does not make it the only story. Humans are and have been living on this planet with wildly diverse political and economic systems. Some more equitable and in balance with the natural world, some more destructive and self-serving (for those who run it).
Capitalism hasn't fallen far from the feudalism tree where the few own the many and justifications of 'it's just the way it is' keep the peons in line. Before it was god saying so, now it's just science...
Your example cannot be applied on larger groups. Indigenous people living in small groups do not count because they function more like families. Even so, there are still degrees of power, just not so evident or in a mass scale.
Upon further reading of yours, I found this
"Truth is a human construct and therefore subjective to interpretation and point of examination." - kyriacos
Thought it might be applicable ;)
very much so. we are all students here :)