Offer your thoughts or opinion on the input financial query or topic using your financial background.

If a country can just print money, is global debt between countries real? 
I think the important fact here is that all of our currencies are Fiat Currencies. So currency technically means nothing, because (as you mentioned) the country could print more any time it wants. Now what makes it useful is the combination of two big things: So I would say, we know they owe us 100 "dollars", and the dollar is just a word we use to represent value. It is not technically worth anything, beyond the fact that the government controls the amount of that currency in circulation and you trust that people still want more of that currency.