These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Tuf Voyaging
Anvilicious: The S'uthlam stories indicate that overpopulation is a major threat. And "A Beast For Norn" tells us that blood sports are bad.
Deus ex Machina: In-Universe. A certain civilization faces extintion by overpopulation, famine, disease or what seems to be a global attack by some unknown lifeform, and then, this giant spaceship pops out from hyperspace and solves the problem... for a price.