Well, I am currently trying to design a full campaign world based on the geography of Earth, with a few minor changes. Granted, my development has slowed down since my wife had a baby two weeks ago, and in the hectic days before that… Heck, I have not done too much since finding out she was pregnant, other than posting it in the Setting Proposal area…
http://enworld.cyberstreet.com/news...lder/Setting_Proposals/WorldProposalTerra.doc
Humans in no way dominate my world, but I consider them a “rising” power. There are human barbarians throughout the world, but the civilized humans are basically in seven areas of the world, the biggest areas being the equivalents of western Europe and the east coast of China. There are some other settlements of civilized humans in California/Mexico, some in southern Africa, some in the Middle East, New England and India.
The world is dominated by a huge hobgoblin Empire that I based (very loosely) on the old Mongol empires. It basically spans from just east of the humans in western Europe all the way to just west of the humans on the East Coast of China, south to the humans in India and all the way to the northern boundaries of Russia. Only some heroic efforts by some human warriors in China, India and western Europe has the hobgoblin Empire been slowed. However, in the process, the humans scattered, being driven to the equivalent of India, western Europe, east China, or going overseas east to California, west to New England, south to Africa, with only some remaining in the Middle East/Egypt.
However, there is a major dwarven empire in the Andes mountain region of South America that is also loosely related to the dwarven empire in the Rocky mountain region of the US and Canada, while elves dominate the lush forests of the eastern US and the Pacific Northwest, vast legions of savage orcs haunt the jungles of Africa, while lizardmen have a huge empire in South America in the Congo region. There are goblins and kobolds everywhere, while Halflings and gnomes seem to have small settlements within other more goodly races – near humans and elves for Halflings, while near humans or dwarves for gnomes.
I set it up that there is one major race that is the Chosen race for each of the 8 primary deities of my world – elves are the Chosen of the C/G god or goddess, hobgoblins of the lawful evil one, etc. Each god or goddess is a different alignment, save true neutral. Hobgoblins got the jump on world conquest due to their god acting first to try and actually conquer the world, taking the other deities by surprise.