What would the economic implications for both exporting countries and importing countries be if the world were?

The world without interdependence is the world without trade and international investment. It will be like a basic Keynesian model 1 Y=C+I 2. C=a+bY It might be great for multiplier effects,but not the standard of living.

This is because investment will be only a small amount compared to internal trade and investment.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.