Everyone disagrees what socialism is. Is Nordic or German social democracy not socialism? Maybe it isn't. But what about all the millions people in those countries that proudly claim to be "socialists" but never ever want to abolish the free market or parliamentary democracy?

"Socialism" can either be a common name for ALL the ideologies that branched from the original throughout history, or it can be a specific ideology that is closer to what we today would call "Communism". It's not entirely clear which is meant, if someone says "socialism" or that they are "socialists".