Rule of law as institutional substrate — contract enforcement, judicial independence, equal treatment before the law. Upstream of most other axes.
Loi of 28 May 2002 legalising euthanasia under conditions: adult patient, persistent and unbearable suffering, explicit voluntary request, medical procedure by registered physician, review by Federal Control Commission. Belgium became the second country globally (after Netherlands, 2001) to legalise euthanasia. Extended to competent minors in 2014.
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.