Anonymous. (2026). The Boxell et al. finding that pre-2012 polarization grew most among elderly non-users directly challenges the claim that algorithmic curation is a significant causal factor, as polarization trends predate and are independent of platform exposure. Isonomia. https://www.isonomia.app/a/4FOTXMma@a65ddc5a0aac0da3d097766a7136ed25e04cb3bd70522aed4a62f23bb5ae20fe