A needle, more useful and more difficult to make than you think.
Why is this so significant?
Yes it is a needle, it is used for sewing materials together.
The reason it is significant is because it is the oldest tool ever discovered that was not designed for killing or eating.
The first tool of construction. Men and women made clothes and other usefull items from this one giant leap in technology. It’s our first actual tool of construction. Everything before it was a tool for cutting, chopping, crushing or stabbing. Most previuos tools made things smaller, except this one which made things bigger. The first bone needles were found 6000BC older than recorded civilisation itself, You might assume it was a prerequisite for civilisation.
If you still think the needle is insignificant, try to make one that works well. you’ll find it’s very hard to do.
Using this knowledge imagine what would happen when civilsation as we know it collapses. The factories that currently produce needles would likely cease production at least for a time. Trade and transport networks will be disrupted perhaps permanently. The production of new clothes would likey halt. People would have worn and damaged clothes and be perhaps unable to replace them. New clothes may become rare and expensive to manufacture. Clothes are made of woven threads, theads will not be scarce. Needles possibly will be. Needles will likely become quite valuable. It’s possible may become a form of currency or at the very least a valuable item of barter. It’s clear that needles will be far more valuable than they are today.
Less obvious uses for a needle:
A needle can be bent and turned into a fishing hook.
Needles can be used as pins for sewing.
Needles can be used to clean out a wound or prick open a blister.
A magnetised needle floating on still water can be used as a compass.
Needle can be use to clear a small blockage in a metal filter or small gague pipes.
Stitching a wound closed.