The first stone tools: the Oldowan toolkit
Deliberate technology enters the fossil record
Quick facts
- When
- About 2.6 million years ago
- Toolkit name
- Oldowan
- What it included
- Hammerstones, stone cores, sharp struck flakes
- Evidence base
- Thousands of excavated, studied, and dated archaeological sites
What happened
By about 2.6 million years ago, early humans were deliberately shaping stone into tools. The Smithsonian's Human Origins Program describes this earliest toolkit, the Oldowan, as the most basic stone implements our ancestors made: hammerstones used to strike other rocks, the stone cores those strikes came from, and the sharp flakes knocked off in the process. Toolmaking then continues across the roughly 2.6 million years since, spanning thousands of excavated archaeological sites that have been studied and dated, an unbroken technological record from a chipped stone flake to the device this sentence is being read on.
Why it matters
Deliberate toolmaking is one of the clearest boundary markers between an animal that only uses what it finds and one that reshapes raw material on purpose. Every technology built by later humans, from bronze tools to spacecraft, descends from this first act of striking one rock against another with intent.
How we know
The Smithsonian Human Origins Program states that stone toolmaking spans the past 2.6 million years and describes the Oldowan toolkit by name: hammerstones, stone cores, and sharp flakes, recovered from thousands of archaeological sites.
Sources
- Smithsonian Institution. Stone tools (Smithsonian Human Origins Program) (2024) · Reputable sourcehumanorigins.si.edu · The domain "humanorigins.si.edu" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
- Semaw et al.. 2.6-million-year-old stone tools and associated bones from OGS-6 and OGS-7, Gona, Afar, Ethiopia (Journal of Human Evolution, 2003, via PubMed) (2003) · Peer-reviewed (author-declared)pubmed.ncbi.nlm.nih.gov · Cited as a "journal" source (no stronger domain match). · Link is live and its text matches the event's key terms (Jul 2026)
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Part of a timelineHuman Evolution12 events · Seven million years from the last ancestor we shared with other apes to the species writing this sentence.View all →