What have you done!?
What? What? Whaaaaaat?
Isn't Australia better as a swamp anyway?
So I tried running that same world param set for, uh, a longer time. 4000 years to be precise. Well it crashed out at 3720-something, so I re-ran it for 3000 years. Interesting results. The dragon population is not much bigger - just under 30, the wandering hunters seem to run into them often enough, even on the isolated continent (there's a tip that is within zone of influence of one civ) to keep them from overcrowding. Minotaurs seem to be doing fine, I haven't checked the cyclops/ettin/giant populations in detail. There's also three thousand years of accumulated literature in the Necromancer towers - looking at the broad sweep of intellectual currents in Legends mode is pretty fun.
What was interesting was what happened to the dwarf civs. There are 4 in this world. One in the far north near goblins and humans, one in the west surrounded by swamps and goblins, two in the center - one near elves, one near humans but with access to various other places. In my original run, the northern civ's starting dwarf king promptly became a vampire and (in cooperation with the neighbor human civ) conquered and exterminated the goblins, the swamp-surrounded dwarves got wiped out by their goblin neighbors, and the other two civs just did the usual dwarfy stuff.
In the 3K-year-run, however, an entirely different history. The northern civ had a succession of normal non-vampire monarchs, then a few hundred years in, a goblin became king, ruled for about a thousand years (goblins are immortal), then became a vampire, and his reign of terror across the entire north continues to this day. The swamp dwarves, instead of getting wiped out - well, the monarch is a goblin queen, and the capital's population is ~700 dwarves and over 10000 goblins. The elf-neighboring dwarves got beaten and eaten - their last monarch was a human queen. And the last civ? They had a succession of mostly ordinary monarchs, up to about 1100, when their queen became a vampire and ruled for two millennia. Then, in 2984, she was assassinated, and a new, normal king has been crowned. His first act as monarch: "In the early spring of 2986, Onget lifted numerous oppressive laws from The Dyes of Closing."
So out of 4 dwarf civs, one is extinct, two suffer the rule of tyrannical despots, and one has just overthrown such a despot. A new king is crowned, justice has its champion once more. A new age for Dwarvenkind dawns ...
Yeah, I think this is the right time and place to strike the earth.