Our ancestors could have started to make modest improvements to simple tools without the need for teaching.

However, as tools became more complex, teaching started to become beneficial. Improved teaching skills would, in turn, allow for the creation of more complex and efficient tools.

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Relying on more complex tools increase the ability to teach

Humans are most capable of passing knowledge down the generations.

Simple and complex tools generally improve through generations. A study found that with complex tools, teaching consistently led to more improvement compared to other conditions.

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