The core of my point concerns more the mathematics of these networks.I do not think that the problem are the supply chains itself, but its size and its topology, as well as velocity of exchange. Mine is a conjecture, and perhaps I am wrong. But the history shows how over extended networks, like the silk road, infections like the black dead easily spread. These networks not only facilitate the transport of epidemics, but open ecosystems where trapped diseases can be easily transported.
Thanks for the feed back. I implemented small changes in the text in response to these comments