Yes, this is a very good area to look at.
There are often surprising results as well: for instance, two countries can benefit from trading with each other even if one produces everything more cheaply than the other (i.e. that country has a 'comparative advantage').
I can't say whether your question is too broad or not though, because that paragraph doesn't seem to contain a question!
If you propose one, maybe some of us can think about possible modifications to consider.