Another myth seems to be that Norway was a very poor nation before the discovery of oil. According to Jan Eivind Myhre[0], professor emeritus in history at the University of Oslo, this isn't true. Norway has been one of the wealthiest countries in Europe for hundreds of years. We had, and to some degree still have, a huge merchant fleet. We've always been big in shipping insurance, probably a by-product of the merchant fleet. The fishing industry has always been a huge part of the economy, same with raw materials.
It's an interesting read, but perhaps a bit more debatable than the myth about a drunk danish minister.
[0] https://www.sciencenorway.no/economy-history/crushing-the-my...