Rule of law as institutional substrate — contract enforcement, judicial independence, equal treatment before the law. Upstream of most other axes.
Ley 19.075 (10 Apr 2013) legalised same-sex marriage in Uruguay — twelfth country globally, second in LatAm after Argentina (2010). Gender-neutral marriage-age reforms, adoption rights, surname-selection rules + divorce procedure updates. Passed Chamber 81-6, Senate 23-8. Complemented 2007 Unión Concubinaria law + 2009 adoption reform + 2012 abortion decriminalisation.
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.