Okay, then in what sense did social fail? I mean, it's true that the Soviet Union and its satellites in Eastern Europe called themselves "socialist"--but they also called themselves "democratic." Were they socialist? Well, you can argue about what Socialism is, but there are some ideas that are sort of at the core of it, like workers' control over production, elimination of wage labor, things like that. Did those countries have any of those things? They weren't even a thought there. In the pre-Bolshevik part of the Russian Revolution, there were socialist initiatives--but they were crushed instantly after the Bolsheviks took power, like within months. In fact, just as the moves towards democracy in Russia were instantly destroyed, the moves towards socialism were equally instantly destroyed. The Bolshevik takeover was a coup--and that was perfectly well understood at the time, in fact. So if you look in the mainstream of the Marxist movement, Lenin's takeover was regarded as counter-revolutionary; if you look at independent leftists like Bertrand Russell, it was instantly obvious to them; to the libertarian left, it was a truism.
But that truism has been driven out of people's heads over the years, as part of a whole prolonged effort to discredit the very idea of socialism by associating it with Soviet totalitarianism. And obviously that effort has been extremely successful--that's why people can tell themselves that socialism failed when they look at what happened to the Soviet Union, and not even see the slightest thing odd about it. And that's been a very valuable propaganda triumph for elites in the West--because it's made it very easy to undercut moves towards real changes in the social system here by saying, "Well, that's socialism--and look what it leads to."
Okay, hopefully with the fall of the Soviet Union we can at least begin to get past that barrier, and start recovering an understanding of what socialism could really stand for.