The elves are not a true single kingdom. There are a series of kingdoms, independent baronies and such. While there is no single government, there is remarkable consistancy in dealing with external affaris. The elves are a sleeping giant normally. The elves, as a series of governments, do not normally get involved in world affairs outside of careful diplomacy. Despite not projecting military power around Oceana, they are considered a super power.
The Elves are a feudal society of small villages. They have an overabundance of resources and spend time giving gifts. See Cannibals & Kings: Origins of Cultures by Marvin Harris.for the discussion on Big Men and Pacific Northwest potlatch customs. There are multiple kings, numerous dukes, earls and barons. The common folks have a say in their local nobles court, but do not have any official vote or privileges. The average village is 200 elves.
The Elven titles of nobility
The Elves live in a series of mid-sized to small islands in the climate region similar to New England. The land is moderately fertile, but the sea is very fertile. Elves live in very small villages ruled by a noble. Their lands run fairly far from east to west. To the south and east is Rome. To the west is the Border Lands. To the north are the Vikings.
References:
Elves in the Elven lands tend to worship Eolpa, the various agriculture gods and ocean goddess Cemepou.
Elves in the cities tend towards same gods, but on a more ceremonial basis.
The elven lands are known for their sea foods, furs and fine wood products. Elves are also known for the export of magic items, especially espensive ones. Elves trade for metal goods that they do not wish to both making..
Elves do some trading by ship, but most stay at home fishing, hunting, and such. .
Each Elven noble has a series of direct retainers (House Carls) of warriers and wizards. There are also levies that can be called up for limited service plus all adults are part of a militia.
It is rare to see elven military forces outside of theri home island or local waters.
The elves are a loosely aligned semi-feudal society. They have ambassadors in the major countries and city-states. The spend money playing off the various monster tribes against each other and against the humans.