Stone tool food-processing began at least three million years ago.

Evidence

The influence of socially learned food-processing techniques on our genetic evolution probably occurred very gradually, perhaps beginning with the earliest stone tools. Such tools had likely begun to emerge by at least 3 million years ago (see chapter 15 ) and were probably used for processing meat—pounding, chopping, slicing, and dicing. — Joseph Henrich, The Secret of Our Success, 231

Categorization

• XREF: connects to: Complex tools preceded and drove the evolution of causal-model reasoning. — Joseph Henrich, The Secret of Our Success: How Culture…, 1041; Human life began in Africa with stone tools creation. — Neil MacGregor, A History of the World in 100 Objects, 64; Making stone tools likely relates to learning speech. — Neil MacGregor, A History of the World in 100 Objects, 96 (+1 more)

Broader Connections

• Human life began in Africa with stone tools creation. #expands (0.80) — Neil MacGregor, A History of the World in 100 Objects, 64
• Making stone tools likely relates to learning speech. #expands (0.72) — Neil MacGregor, A History of the World in 100 Objects, 96