Plato
Justice-as-harmony is the doctrine's operation; the philosopher-king is refused — grant the pilot, refuse his throne.
Edition read. The Republic, Books I–X, read line-by-line (Jowett translation).
What we took
Justice-as-harmony — temperance across the parts, injustice as one part usurping the whole — is precisely the Axiacratic act read across ten axes; both extremes of an axis are disease, so health is a band, not a peak. The decline-of-regimes is the doctrine's survivability science, and the property-less guardians are the ancestor of the non-transferable ledger that divorces power from wealth.
Where we diverge — and how we answer
The philosopher-king and the single knowable Good are refused: means-expertise is real, but ends-authority stays with the demos — legitimacy is not knowledge. The noble lie and the censorship of art are rejected for no-official-truth and annotate-not-censor. The Cave is kept, but turned into the mirror the doctrine holds to its own dashboard.
The net position
The fountainhead — it names the doctrine's operation, its death (mono-optimisation), and its ledger, and its philosopher-king is the sharpest test the doctrine's fallibilist, no-official-truth commitments were built to pass.
Every position is read at the source. See the whole register on Lineage & Critique, or the doctrine itself in The System.