The Socialist Democracy Group was formed in late 1998 by Phil Hearse and a small number of comrades who left Militant Labour. Shortly afterwards they were joined by another small group who had recently left the International Socialist Group / Socialist Outlook.
Socialist Democracy was an early proponent of the idea of building broad class-struggle parties of the left and it was a strong supporter of the Scottish Socialist Party and the Socialist Alliance.
Nine issues of the journal Socialist Democracy were published, all of which can be found here.
For a critical discussion of the Socialist Democracy Group, at its founding, see the article by Charli Langford in Workers Action no1