Believe it or not, there’s no power structure that is immune to not having a benevolent individual at the center. That’s because most things are norms and practices developed culturally, not codified in power structures or laws.
Of course, it's not a perfect system, but it tends to avoid the excesses of control, violence and oppression that other power structures can enable. I try to avoid employers, clubs and other organisations whose internal dynamics don't resemble it (aside from the killing). As a result, I've mostly avoided the kind of stress and politics that other people seem to find themselves mired in.
The most valuable resource is trust. Follow closely by the trust-structures to deal with the ramifications of the primary trust-relationship being broken.
That is to say, the most fundamental rule is contract law.
In most jurisdictions anyone would want to live in, a handshake deal is as good as a contract.
Additionally, and again in any jurisdiction anyone would want to live in, when you purchase a durable good you’re entering into a contract with the seller and / or the manufacturer with regard to the advertised claims of the product and any warranted considerations.
Also, consumer items usually come with some guarantees, for example that your baby spinach didn’t kill you or result in harm to a gestating foetus, and so on and so forth.