I've never seen any indication that the worlds extend beyond the displayed regions. Also, since the world's "core" (HFS) is the exact same width and length of every layer of rock above it, I'd say they probably don't even curve.
You have no idea what's under HFS. What if it is 8,000 miles of slade to the core? The radius difference from topside to HFS would not even add up to a single tile if the world is sufficiently large.
Also, you have no idea how wide tiles are for sure, so you can't even calculate that. Nor do you have a guarantee that tiles in HFS are supposed to be as wide as tiles on the surface... Maybe they're 15% narrower, and also the atmosphere down there is thicker so that your movements tend to get slowed down by 15%. Or whatever. (tile physics and space don't make sense in the first place anyway)
Fair enough on the topography display. Though the point I was making is that the generated worlds don't necessarily have to work exactly as they do on Earth to make sense, as long as each generated world is at least consistent with it's own generated rules. They could be traditional planets as we know them, or they could be flat; as long as there's a semi-rational explanation for how things differ from Earth.
Example: The dead cannot live again on Earth, but they can resurrect in DF worlds- as long as somebody discovered the "secrets of life and death" somehow and willed it to happen or if the corpse was affected by inherently evil terrain. The rule is very consistent with itself, and thus necromancy is a logical event governed by natural laws within every world generation. So why not have a "secret of day and night" that determines how the sun(s) move?
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There have never been any historically recorded religious wars fought by polytheistic religions. ...
Religious wars are unheard of among polytheists. ...
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While none of the Polytheistic religions have had religious wars against other Polytheist religions (excluding wars faught against monotheists because it does not take two to tango in this case). ...
Once again your point of view doesn't seem to take the world into account beyond Europe and the Mediterranean.
The Aztecs and their neighboring nations waged war for literally no other reason than for their polytheistic religion, initially because they considered their neighbors to be worshiping the Sun god incorrectly, and after that as a way to ceremoniously collect strong sacrifices for this god. It's not like they needed the resources, after all. Central America is and always has been a paradise for agriculture, they didn't work or know about any weapon metals and obsidian was everywhere- the "Flower Wars" were fought specifically in honor of the Sun god.
And over in Japan, we've got Shinto, developed by the Japanese shortly before or after they arrived on the islands from what is now Korea. The Shinto adherents are known to have launched several invasions against the native Ainu people for no other reason than because they worshiped the wrong set of gods.
Not to mention all the tribal wars fought for the sake of ancestors and spirits in pre-colonization Africa, the list would stretch on for miles.
The fact that there can be oceans at the edge of map without all the water draining away indicates that the world is actually round. I think a dwarf fortress 'world' is actually an isolated region (like pre-columbus America) within a larger world that is unknown to them.
They are even explicitly called regions.
A single tile of aquifer has more than enough water to flood the entire map as long as you can design a pumping systems to get it that high without flowing back into the aquifer. No matter what measurements you apply to the individual tiles, a finite water supply shouldn't be able to do that. Since water clearly isn't finite, it doesn't necessarily have to all drain off the flat edge that may exist on the border of a generated world- so long as the oceans are fed by more aquifer tiles than can drain off border tiles.
And I've seen generated worlds called anything from "realm" (An old-timey way to say nation or country) to "universe". (Implying that the displayed world is literally all there is in existence.)
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If that were an election we would consider that a vast majority. History is also not over, Monotheism has not been around for very long relatively. It went from 0% to 50% in *only* 3000 years.
The land-line telephone has only existed for like, 1/30 of that time; and not too long ago everyone had at least one. How long ago something came into practice isn't really a good way to measure how long it'll stick around.