Hunter gatherer societies achieve almost complete economic equality largely because their economy is based primarily on sharing not exchange or command.
Our exchange economy inevitably creates inequality because people with something more valuable can exchange for more of the stuff other people have.
In a sharing economy your goods and skills are shared with the group, everyone contributes what they can, even though some can and do contribute more, no one worried about that, as long as everyone tries. If you are too young old or disabled to contribute you still get the same access to stuff. I have not found accounts of able people habitually contributing nothing, they will skip work sometimes if they don't feel like it, I expect they would be face dire consequences if persistent.
Hunter gatherer societies are 1) relatively small, 2) everyone knows everyone and are usually related, 3) there is minimal division of labor and 4) everyone can see what everyone else is doing and what they have.
The question is are these things essential for a sharing economy or can a large, even global, economy do the same and so enjoy both equality and complex technology? What would such an economy be like, would it be happier, or seem much the same once we get used to it? Surprisingly I have not come across much attempt to answer this, I will try to make a start here.
1) Scale. Is smallness necessary for sharing?
Public libraries are based on sharing easily moved non-perishable objects, and with inter-loan form a global system. They work pretty well. Food banks work in large cities, so sharing of perishables, things that can't be returned, also seems to work on a large scale. Roads are shared over vast distances, so immovable infrastructure also works. It is not clear what would happen if everything in an economy was treated like this at the same time, especially things that are rare and valuable.
2) Is it necessary for everyone to know everyone and be related?
Again libraries, food banks and roads do not involve everyone knowing everyone, libraries and roads do require identification, library cards and drivers licenses, I expect most food banks identify individuals, at least from memory, to make sure no one takes more than their fair share.
Many people do care less about people they do not know, or even hate foreigners or different ethnic, racial or other groups. It seems unlikely large scale sharing would be adopted or work as long as this is true.
3) Is minimal division of labor necessary for sharing?
People voluntarily share all kinds or skills and all kinds of goods in modern society, one off acts of sharing like this would probably work on a large scale, much like shopping in an exchange economy. I am not aware of a large factory or corporation being run voluntarily, where large numbers of people interlock in the same roles over a very long period, it may happen with aid organizations like the Red Cross. If people are basically free, have free access to resources for survival though sharing, have equal access to land and housing, do not have to make money, it may be hard to find workers for unpleasant or boring interlocking jobs especially over long periods.
It is also hard to see how a large factory or corporation could be efficient without a hierarchy, a chain of command. If every major decision required an egalitarian (the aim of this essay) consensus or majority, common sense would say it would take forever and nothing would get done, unless perhaps there was an extraordinary leap in human maturity and rationality.
It seems like it could only work if people were very motivated to do good for the community or humanity, the planet, if that ever happens finding workers to make slot machines, nuclear weapons or hard drugs might be impossible. Basically I find this factor the most difficult and am still thinking about it.
4) Is it necessary for everyone to see what everyone else is doing and what they have?
In a large economy it is impossible for everyone to see directly what everyone is doing and how much they have because of distance and privacy. It would be possible to keep an electronic transaction of all, or most, sharing transactions as is done electronically with exchange today. This could be monitored, perhaps by anyone, or automatically, personal identification would not be essential if privacy is need for security for instance, as is the case with number plates today.
This electronic record would require the internet and computers, something much like the banking system, as mentioned above I am not certain we could maintain such a complex technological and administrative system if people are not desperate for money or personally ambitious (ambition would be rarer when everything is shared, no personal fortunes being possible). But again I am unsure about this and will have to think about it.
Given the uncertainties it would seem any real world attempts at large scale sharing systems should be limited and reversible, along side proven exchange systems.
Feel free to share your thoughts below.
References.
The Semai. A Non-Violent People of Malaya. R Dentan.1968.
Anthropology and the Economy of Sharing. T Widlock. 2017.
Hunters and Gatherers. Property, Power and Ideology. Ingold, Riches, Woodburn. 1988.
The Hadza. Hunter Gatherers of Tanzania. F Marlowe. 2010.







