Platos Republic achieves military success and subsistence but no art or science.

Evidence

When we ask: what will Plato’s Republic achieve? the answer is rather humdrum. It will achieve success in wars against roughly equal populations, and it will secure a livelihood for a certain small number of people. It will almost certainly produce no art or science, because of its rigidity; in this respect, as in others, it will be like Sparta. — Bertrand Russell, History of Western Philosophy, 543

Categorization

• XREF: XREF Plato’s Republic evaluation
• corroborated: 2 independent passages support this claim — Bertrand Russell, History of Western Philosophy, 543