Oddbean new post about login | logout 100% There are no human societies without a system for redress of grievances. Even groups of shipwrecked castaways in the Age of Sail and San hunter-gatherers in the Kalahari. Before the State, most were enforced by ad hoc tribunals of elders, according to evolving legal precedents.
I was literally thinking about law-str earlier today. The substantive side must be left up to each community, but we could have protocol level support for procedural stuff: case listings, summons and subpeonas, directions hearings, evidence submission, judgements. That's still "opinionated", but can be made compatible with just about any extant or historical legal system.