When the worlds ends... Answered
I just learned that China's six biggest ports now ship 25 times more goods than the entire planet shipped just a generation ago.
A few logical steps later, I found myself wondering;
How long could [insert country of choice] last if all international transport (including materials transported via pipes) were suddenly shut off?
How far back down the scale of civilisation would your nation slide before it stabilised?
Which countries would fare worst? Best?