The WIMP became dark matter's 'evidential keystone' in the mid-1980s because convergent, independently warranted results made particle identification and cosmic attribution jointly attainable

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Allzén (2026) traces a specific lineage for why the WIMP acquired a coordinating role in dark-matter research, rather than treating "dark matter is a particle" as a default assumption. Gershtein and Zel'dovich (1966) used cosmological density bounds to constrain neutrino mass — the first step connecting a particle property to cosmic dynamics. Cowsik and McClelland (1973) then proposed massive neutrinos as the missing mass in galaxy clusters. Tremaine and Gunn (1979) derived a phase-space bound limiting ordinary neutrinos' capacity to constitute galactic halos, closing off that specific candidate while demonstrating that astronomical data could directly constrain particle properties. Drukier and Stodolsky (1984), and Goodman and Witten (1985), then supplied the direct-detection methodology letting a terrestrial experiment target a galactic-halo candidate. Supersymmetric theories, meanwhile, supplied stable weak-scale relics motivated independently of the astronomical anomalies, whose freeze-out abundance could be of the order required — the convergence the field's vernacular calls the WIMP miracle, a term the paper itself does not use. No single one of these results was sufficient for discovery on its own, per the paper, but their convergence from otherwise-unconnected subfields could jointly warrant it — the role the paper names an "evidential keystone."

This is the historical complement to the two-part logical framework in claim-allzen-four-condition-dark-matter-discovery-framework: the WIMP's distinctive promise was that constitutive identification and cosmic attribution looked jointly attainable through independent lines of evidence converging on one candidate, not that either condition was separately settled.

This single-author, unrefereed arXiv preprint (Tier 1) is one of three claim-notes resting on it, reaching the vault's single-source concentration cap; see question-corroborate-allzen-2610-14137-dark-matter-discovery-framework. The historical attributions (Gershtein/Zel'dovich, Cowsik/McClelland, Tremaine/Gunn, Drukier/Stodolsky, Goodman/Witten) are Allzén's own citations within his argument, not independently verified against the original 1960s–80s papers this session.