How do you define socialism, then? Does that automatically follow that since a country is providing free healthcare, education, and other social services to its people it is already a socialist country? How about the fact that capitalism and democracy is actually very much vibrant in the European countries that you've mentioned like France and Norway? Or is it that both capitalism and socialism could exist side by side in a government?
The essence of socialism is very simple - steal the money from the successful people and distribute a part of it among the poor. Since the poor have a greater voting power, the political party which promises to do this will be elected to power very comfortably. Now the problem with Socialism is that, eventually they run out of money to steal from. Successful people will either migrate to other countries (similar to what happened in Cuba), or they will lose their money and become poor themselves.