I saw a Reddit post where a DM tried to figure out how a city in their campaign could exist and feed itself. But in the end, after many hours with Excel spreadsheets, it couldn't. And they were disheartened.But I thought instead it was actually a great justification for fantasy adventure gaming's active and close gods who meddle in mortal affairs. Most of the time we ignore this, but why? Why not give a very strong reason your mortal population is praying to the gods.How can a city exist when it can't produce enough food or have access to water?The...