Closer To Truth Why Philosophy of Evolutionary Biology?
May 13, 2026
Dennis Noble, systems biologist who highlights organism-to-genome feedback and non-genetic inheritance, and Elliott Sober, philosopher of biology known for work on selection and common ancestry. They probe what natural selection and common ancestry really mean. They debate evidence for ancestry, how selection links to history, and whether inheritance and causation are one-way or interactive.
AI Snips
Chapters
Transcript
Episode notes
Nonadaptive Traits Are Strong Evidence For Descent
- Sober explains evidence strategies: nonadaptive similarities support common ancestry while adaptive similarities may reflect convergent evolution.
- Example: tailbones in humans and monkeys are poor function but strong evidence for shared descent.
Two Ways To Link Selection And Descent
- Sober contrasts causal and evidential ordering: Darwin framed natural selection as causal motor producing extinction and adaptation across a genealogical tree.
- Without common ancestry, you lack the lineage context to trace selection's effects over time.
The Ancestor's Tale Pilgrimage Of The Tree
- Richard Dawkins recounts the one tree of life supported by a universal genetic code.
- He describes The Ancestor's Tale pilgrimage approach and surprising junctions like only ~30 major concestors.