How will this affect the Internet in other countries?
That’s probably a question that someone with more technical knowledge than me will have to answer.
But my best layman’s guess is that while large portions of the internet outside the US could survive, the loss of the US network would decimate it badly. That is, until enterprising people went to work on the problem. :-)
I’m betting, though, that it would be difficult, if not impossible, to completely shut it down.
Not that I understand why anyone would want to. Shutting down the internet now would be the equivalent of shutting down the world’s economy.
Wait a minute...I guess that is a reason to shut down the internet...
;-)