https://youtu.be/gNRnrn5DE58?si=VTrpcfDDDukItwCH
It’s an older video, but I really enjoyed it and found it really thought provoking. Precision is something we take for granted but as this video shows it’s something that was incredibly difficult to get to where we are.
Fun fact: precision was perfected in America and exported to the world. Your millimeter is a direct descendent and would not exist without the vastly superior mil.