Well it depends on how you define “socialism” which is used to mean anything from a socialist policy to a fully socialist society. For some socialist policies, you can simply vote in some socialists into a parliamentary system and get them to pass some.

But there’s never been enough socialists peacefully voted into power to make a fully socialist/communist society, so those attempts have always come at the barrel of a gun, which so far has always resulted in an authoritarian regime.

I’d love to see one actually get voted into power someday, but I have a feeling I will be waiting for a very long time.