I think David sums it very well:

Global soldier (in the Cold War), Global policeman (in GWOT), Global banker and emergency helper (today) - nice slogans. What underpins them? National interest and a capability to intervene. What are the weaknesses of either or both? Then select contrasting examples, of the minimum and maximum "footprint".
and I think that the issue of the minimum or maximum "footprint" is key.

So much for my thoughts. A piece of advice on writing a 10-page article from my law school faculty advisor (who qualified as a SME on your topic). Feel free to write a 100-page article. Then condense that down to 10-pages. The latter will be 10 times better than the former. The same lesson also included a lesson on my use of "Weltanschauung" in the draft. You know German; I know German; but you are writing in English - so don't show off and just say "worldview".

Regards

Mike