Here’s a ten minute video of Anders Winroth, whose book The Age of the Vikings I reviewed a few inches south of this post. In this interview he discusses his previous book, The Conversion of Scandinavia. I have purchased that book and will report when I get it finished.
I generally agree with his view that conversion had prestige value in the Viking Age. I’m interested to see if he cites Fridtjof Birkeli’s untranslated book, Tolv Aar Hadde Kristendommen Vaert i Norge (Twelve Years Had Christianity Been in Norway). Birkeli argues that, in Norway, Haakon the Good’s peaceful approach to missionary work was just as (or more) effective over the long run than the better-publicized bloody crusades of the two Olafs.