Under the new imperialism europe did not need large numbers of people to control territories because of

The Viking age ended when the raids stopped. The year 1066 is frequently used as a convenient marker for the end of the Viking age. At the Battle of Stamford Bridge, the Norwegian king Haraldr harðráði was repulsed and killed as he attempted to reclaim a portion of England. ... The Vikings weren't conquered.

hope this helps

Vikings ended when the raid stopped

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.

during the middle ages bibles and most christian literature was written in latin i think that’s the answer you are looking for