Society had to rebuild after the asteroid hit in 2405, and most of humanity left Earth. In 10,000 AD, societies all over the world are at pre-industrial levels. Europeans in 10,000 are different than the Europeans in 2000. In the fifth millenium, people from the Middle East and North Africa emigrated to Europe, crossing over the land bridges in Asia Minor and Gibraltar. Their genetics merged together with those of the native Europeans, over the next five thousand years, they became several different ethnic groups, allegory to those eight thousand years prior.
The most powerful nation in Western Europe is Avirsta, which controls several vassal states.