That's a lie....
Vikings had a written language, a diverse religious belief system, they were skilled explorers, they had a democracy, capability to interact with other cultures, colonized areas and etc...
The Vikings were so advanced and good at what they did, that their people no longer had the need for Vikings.
They went out, discovered the world and brought it back home to advance their people...so they no longer had to leave...
That's some real leadership, nation building type shyt.
The Viking is more so a role and occupation.
Scandinavian/Nordic people had one of the most advanced ancient civilizations out there.