Historians and writers, from the Viking Age onward, have suggested many different reasons why, between the years 800–1100, there was this sudden surge of activity on the part of the Scandinavian people:
- Monastic writers thought it was God’s punishment.
- European clerics, such as Adam of Bremen and Dudo of St-Quentin, attributed it to over-population and land shortage in
Scandinavia. However, there is no real evidence for this, and in some places, such as Rogaland in southwest Norwayand the Baltic , archaeological evidence suggests that the population seems to have been larger in the sixth century. islandof Oland
- The development of the classic Viking ship has been seen as a key to the Viking Age, and certainly without it the Viking Age would not have been possible.
- Icelanders, such as Ari Thorgilsson and Snorri Sturluson, thought the Vikings left
Scandinaviato avoid the growing power of kings. Certainly during the Viking Age, the kings of Denmarkand had much more power and control over their countries than had previously been the case. Norway
- There also appears to have been a trading boom in
Europe- improved ships made it possible to travel and exchange goods farther afield than before.
The account that the Norwegian trader, Ohthere, gave to King Alfred of