try to build a screw, a single screw That's pretty easy if you have a tap and die set, it doesn't require advanced machine tools. I agree fantastic progress h

try to build a screw, a single screw That's pretty easy if you have a tap and die set, it doesn't require advanced machine tools. I agree fantastic progress has been made due to our cooperative societies and the division of labour though, even just in the last few decades, the advances are astounding. The Internet alone is an advance at the level of Gutenberg.