The population was effectively self-selected for those ambitious enough to emigrate, and in many areas, tame a new frontier and/or start businesses. They were then dumped in an environment highly supportive to it (cheap land and natural resources, rapid technical advancement providing huge vistas of economic opportunity) That probably has a significant ripple effect for a few generations. (The "Grandpa had to swim across the Atlantic and learn English and sweep floors to get started, so he's going to ride his kids to make sure they get the most of their education" pattern)
On the other hand, I suspect there's some toxic counterfactors in that; the celebration of bootstrap-pullers tends to encourage "I've got mine" attitudes and may end up underserving parts of the community that would benefit from more social support and community services.
I did manage to dredge this link up, which says that in 1973, Minnesota had the lowest high school drop-out rate in the nation, and the third-lowest crime after Iowa and Maine.
http://news.minnesota.publicradio.org/features/2003/08/12_cu...
Which is no smoking gun, but is suggestive. I'm sure someone could do a deep dive on academic literature in criminology and turn it up, but it won't be me I'm afraid.
- I'm making it up. I'm not, but that would just be taking my word for it twice.
- It's true, and completely random. Seems unlikely.
- It's true, and Scandinavians have a magic low-crime blood factor, perhaps it adheres to the blond gene, next to the lutefisk-appreciation gene. That would be weird, huh? Not necessarily racist, but weird.
- It's true, and Scandinavian Americans have cultural continuity with their brethren in the home countries. That's pretty boring and normal, so this is the one I picked.
- It's true, and due to the Aryan superiority of the Nordic white race, which we must preserve so they can continue to dominate the swarthy people of the world.
You picked that one, not me. I think it's absurd.
- historical coincidence caused subgroup migration from those regions at the time, and there is cultural continuity with that subgroup
After all, Indian Americans are a remarkably tiny high-median-income, low-crime ethnic subgroup in America.
I agree. Given that Scandinavia was the homeland of the Vikings, I think arguing that they have a genetic predisposition away from crime would seem rather absurd.
Definitely not just the fact that there are many other factors at play.
They have a very low crime rate, several times lower than the white average. There was a study on this, and Swedish-Americans and Norwegian-Americans commit crime at about the same rate as Swedes and Norwegians, which is to say, not often.