Homo Habilis
2.3 – 1.5 million years ago
The first toolmakers, and the ongoing argument about where the genus Homo begins.
Every claim in this period carries its evidence with it.
Cranial and dental fragments alongside early flaked stone assemblages and cut-marked animal bone.
- 01
Deliberate stone flaking is attested earlier than the appearance of large-brained hominins.
- 02
Cut marks on bone show access to animal carcasses, whether by hunting or scavenging.
- 03
Brain size in this interval is larger than in australopiths but far below later Homo.
Each row states the method, what is actually measured, and — the part usually skipped — what the result does not settle.
| Method | Material | What it constrains |
|---|---|---|
| Lithic analysis and refitting | Oldowan cores, flakes and debitage | Demonstrates intentional knapping and sometimes reconstructs the sequence of blows. It does not identify the knapper's species. |
| Taphonomy | Cut marks, percussion marks and carnivore tooth marks on bone | Distinguishes hominin from carnivore modification. Order of access is argued case by case. |
| Endocast measurement | Cranial interiors | Gives volume. It says little on its own about cognitive organisation. |
Is Homo habilis a coherent species or a wastebasket taxon?
The referred specimens show variation some researchers read as multiple species.
Hunting or confrontational scavenging?
Both leave overlapping bone-surface signatures.
“Toolmaking begins with our genus.”
Flaked stone assemblages predate the earliest secure Homo fossils, and tool use is not unique to hominins.
“Bigger brain, better tools, in lockstep.”
Toolkit change and brain expansion are not tightly synchronised in the record.
- Who made the earliest flaked tools?
- Was meat a driver of encephalisation or a consequence of other changes?
- How should the early Homo specimens be sorted taxonomically?
Olduvai Gorge excavation series
Cambridge University Press
Early Stone Age technology studies
Journal of Human Evolution / Nature