The socialist parties? I'll grant you the PCF and the trotskyists, but the socialist movement as we know it now was born out of the split between those who wanted socialism and democracy, and those who preferred their socialism served with dictatorship and mass murder - i.e. regardless of what one thinks of the socioeconomic aims of the socialists at various points in time, it is precisely their rejection of the communist political model that distinguishes them from the anti-democratic left.