Russian President Vladimir Putin’s breach of the peace in invading Ukraine is scandalous. But rather than illustrating the importance of a “rules-based international order” that only despots violate and populists threaten — as many pundits and administration officials are now suggesting — the invasion is another reminder of the need to build a better order. As much as any individual or nation is to blame for specific instances of international violence, the existing system reflects a hypocritical commitment to allow a great power war while claiming to prohibit it.