PERSON
Ernst Mayr
The evolutionary biologist who formalized the distinction between how and why—proximate and ultimate causes—and who spent a century insisting that biology is irreducible to physics, a claim that proves equally true of intelligence.
Ernst Mayr is the philosopher hidden inside the biologist. He earned his reputation through fieldwork in New Guinea, through systematics, through his central role in the Modern Synthesis that unified Darwinian selection with Mendelian genetics—and then he spent the last half of a century-long career arguing that all of biology had been thinking about causation wrong. His 1961 paper “Cause and Effect in Biology” drew a distinction that seems obvious once stated and is violated constantly in practice: every biological phenomenon requires two kinds of explanation, the proximate (how does this work?) and the ultimate (why did it evolve?), and confusing the two produces a century of category errors. That distinction arrives in 2026 with undiminished force because the AI discourse is built on exactly the confusion Mayr diagnosed. When someone asks whether
large language models understand—when they observe that the system produces outputs consistent with understanding and conclude the understanding is real—they are committing the error of treating a proximate observation