Particularly about the misunderstandings section.
politics and macroeconomics are not zero-sum games, however, because they do not constitute conserved systems
Or if you don't like Wikipedia, here's an economics website:
In a non-zero-sum game, it is possible for two parties to both benefit from a decision.
It also lists examples for each.
Zero sum games are often misunderstood and used as a vehicle of misinformation to perpetuate the lie that if you do one desirable thing, you lose the status quo.
Therefore, looking after the young and looking after the old is a non-zero sum game because you can literally do both. My best example is Australia; we have aged care and child care, with plenty of room for subsidising mining corporations.