"We" -- to be precise, U.S. policymakers and their quasi-private-sector, tax-nourished enablers-beneficiaries--  must not police the world, become directly involved in wars, covertly assist belligerents, or act as arms merchants and bankers. The central government can't be a benign policeman, even if its intentions were as stated (which they may be): international rules-based order and economic stability. But it can wreak havoc by trying. We know this because it already has. Pick your start date, but the last 30 years present evidence beyond a reasonable doubt of what U.S.-sponsored "order"...