>> You realise the extent to which the world around is sometime quite precariously perched on these supply chains.
As s child, I lived in a world where there were no supply chains, no marketing and no advertising. Profit-based business was seen a mean thing to do.
City living and desire for goods from far away lands - created supply chains which dictate how people should live, in a precariously dependent way such that they can't make their needed things on their own and they can't have them made them locally. What a progress.
Unless you lived thousands of years ago, there was a supply chain. For bread there was a farmer, a miller, and a baker. That's a supply chain. And they were even more profit hungry back then, adulterating the flour with fillers to save money.