First.. the term viking is new.. they wherent vikings..
Also. my point was "Sweden"..
Denmark was the main "viking" nation ( lets just keep the viking term )
over 70% of all vikings came from Denmark.. most space. most people. most food. most power. that was where the first kings where, and danish earls ruled most of Sweden even back at the 7 and 800...
Danish kings was later given the right to rule England by the pope. England had danish kings.. even the last saxon kings where "danish" Harold is infact related to the now royal family of Denmark, that is also the oldest royal family in the world btw..
Same with the Lord of England.
So when the Normans came. they where also in the main part related to Denmark and why it wasnt that hard to settle in England, since it was run mainly by danes..
And why it was called daneland, dane axe, danegaeld and so on..
Vikings also founded the foundation of Russia,, and made the first kingdom in europe with free religion. and the Normans did the same when they sailed and made kingdoms in Italy.
My point was just more.. well first.. back then it wasnt really nation as such. only Denmark. because again location and the other things.. Norway did have some later on. but still by large was ruled from Denmark. ( something the even went on after the viking age , longer story)
So lets forget you said swedes and then say vikings.. its still wrong..
There was the power of Europe south.. that inturn actually gave the power to Denmark and made them "the" viking power because of the location. so the vikings where just "danerne" to the south.. however overall they where stronger..
Vikings did found or lay the foundation to England.. before daneland and the danish kings of England.. England was nothing.. small huts. little trade.. not much.. vikings came, trade exploded.. farms grew. wealth grew ..
Vikings with russia, Italy. the Normas.. sure.. they had main impact on France and Spain and Constantinoble..
They tried a couple of times to take on the muslims in spain however they where to unifed and it most of the times didnt go so well..
But Vikings most of all was about trade.. that was the thing that drove vikings. not raids rape and plunder..
The had system build on trade..
But also a open mind, infact they took in people of other religions to learn.. not many people lived in scandinavia so they didnt mind people coming in. they brought stuff. it was a ressource.. many see them is crazy killing machines. but they where very tollerant..
Woman could even devorse.. in a time where most places woman had no rights..
Rich or poor laws did the same for you.
But yes.. I know my history.. since you ask..
The Rus vikings there was infact many different settlements spreading all the way to constainoble. because they used the river to sail there and trade..
Even made systems to carry ships over land and such on that route.
many things we could talk about.
But Swedes didnt found most of Europe..
But even if you change it to danes or vikings most of Europe was a thing way before.
They did found the later major powers. or laid the foundation for it. for England, Russia and France, and in some way Italian power.