Rule of law as institutional substrate — contract enforcement, judicial independence, equal treatment before the law. Upstream of most other axes.
First major decision of the Zapatero government: announcement 18 April 2004 of withdrawal of Spanish troops from Iraq, completed by late May 2004. Reversed the Aznar government's Azores-Summit alignment of March 2003. Part of broader re-orientation toward Franco-German EU axis and away from US-UK Atlanticism.
Per invariant 3, reforms are scored by what they did on each channel-separated axis, not by the party that enacted them. This fingerprint is how the policy-match engine finds historical analogues.
Explicit links are curated by the author. Inferred links are hypotheses in the library that test the same axes this policy moved — the framework's answer to "what does the data say about a policy like this?".
Ranked by axis-fingerprint overlap with this policy. Direction match bolded — those are the closest historical analogues. Shape of the match is what drives policy-outcome comparison, not the country or party label.