Well to be fair socialism is not necessarily the opposite of capitalism. That's just one particular narrow interpretation called communism (and even that can in theory be reconciled with capitalism in some form or another). At the core capitalism is about how the economy works, and socialism is about how society works.

Anyway Scandinavia kind of varies with the topic. At one point it is basically “wherever the Vikings came from” the next it is the landmass protruding from Russia towards Denmark (aka Sweden, Norway, and yes, Finland).