: That's my question.Well, originally 'Social Democrat' was code for revolutionary Socialist - the Social Democratic Federation (from which the SpGB split) was Britain's first Marxist party - "Social Democracy" got its meaning in opposition to formal democracy, in that it called for a social solution to pollitical problems, and called for democracy to be extended to property and labour.
The term became conflated with opportunism and reformism, partly through the behaviour of the german SPD, partly through the polemics of the Bolsheviks, etc.
None.