> I disagree with the commenter that your replied to directly, who seems to believe the world is a zero-sum game.

The world is multiple repeated games happening simultaneously all over the place. Many of them are zero-sum (e.g. purchasing a home in a certain zip-code) in the short term and medium-term, but not in the long term.

People using the "omg it's not zero sum" generalization are mostly incorrect. Not because everything is zero-sum, but because of how much of a gross simplification it is - so much so that it becomes useless without specifics.