History

What's the most influential tool created in the history of mankind?

Explain your logic.

Warps for thoughtful answers.

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https://en.m.wikipedia.org/wiki/Surface_plate

Joseph Whitworth invented the flat plate, and became the first person to manufacture with a precision up to a millionth of an inch.

He’s why you can by generic screws that fit.

The age of precision manufacturing is important for cars, planes and even semiconductors :)

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