Earlier quoted context omitted.
Metallurgy is by far the most important human technology. That's why "copper", "bronze" and "iron" are used to classify ages.
There is no 'most important' human technology. All of it interlocks, and usually the prerequisite steps all need to be followed before you can progress to the next level. I wonder how long it would take given a paper copy of wikipedia (hopefully printed on acid free paper) to get back to a functional technology society. I'm sure it would go faster than the first time around, but I'm not so sure it would be less than…
Wikipedia is useless for rebooting technological society, it doesn't show where or how to mine the necessary minerals.