Robert A. Wilson, Matthew J. Barker (2007), Stanford Encyclopedia of Philosophy — https://plato.stanford.edu/entries/biology-individual/
Key takeaways
- Biological individuality cannot be settled by equating individuals with organisms: the space of biological individuals is better mapped along the evolutionary (Darwinian) vs physiological (living-agent) distinction, with organisms, some parts of organisms and some groups of organisms each filling distinct regions — genes are Darwinian individuals without being agents, honey-bee colonies arguably likewise.
Seeded from the abstract and a skim, before the reading in NOTE-114. What follows is what the work says about itself.
The entry starts from the question of what biological individuals are and shows how it quickly runs into puzzling cases. It argues for laying out the conceptual space around the question, using the distinction between evolutionary and physiological individuals, and considers groups such as superorganisms and species that have been proposed as individuals. It links individuality to life, reproduction and agency, and closes with recent work on how evolutionary individuals are created and regulated and on the evolution of individuality.
Standing in the record
Filed from the 2026-09-26 sweep of the papers-feed tracker for philosophy: 235 seconds of active reading over 1 session. It was filed Deferred, unread. NOTE-114 is the close reading of 2026-09-26, and it placed the work: Active — worth reading as the standard map of the biological-individuality literature up to 2023 and the hub for this record’s cluster (LIT-049, LIT-157, LIT-188, LIT-142, LIT-210); it is a survey with one tentative framework of its own, not an argument for a thesis, and for parthood it only supplies examples.
When seeded, before the reading in NOTE-114, the entry gave a priority for a deeper reading: high — the highest engagement in this batch and the organising reference for the biological-individuality cluster; the skim maps it, but §§6–7 deserve a full read.
What the seeding asked a deeper reading to check (NOTE-114 is that reading):
- The owner’s most-read item in this batch (t = 235 s); the hub reference for the identity topic on the biology side, tying together LIT-157 (Bourrat), LIT-142 (Meincke), LIT-210 (microbiology) and LIT-160 (units of selection).
- Check how §6.3’s autonomy and agency material fits the teleology and agency debates (LIT-192).
- Check whether the nine-region framework takes a stand on holobionts or leaves them open.
Access when seeded: Full SEP entry fetched directly and read by section (openings of all sections; §§4 and 7 in more depth). First published Thu Aug 9, 2007; substantive revision Wed Jan 17, 2024 (the version read); citation metadata lists Robert A. Wilson and Matthew J. Barker.