Tried to unite in SA & RESPECT. My honest opinion. Think they may have been too hasty, didn''t spend enough time winning people to common cause ie the SP in the SA. Having said that, not sure the SP were winnable, as the SP and the SWP had different agendas for the Socialist Alliance. In the crudest terms, the SWP saw the Socialist Alliance as some kind of alliance of revolutionaries and reformists seeking to build a mass alliance occupying the ground of old Labour where the revolutionaries would have been in a minority, but at least in the organisation, whereas I think the Socialist party, I emphasise I think, the SP saw Socialist Alliance as being in alliance of revolutionaries, or at least those to the left of the Labour Party. This left everybody suspicious of why the Socialist workers party was bending over backwards to accommodate reformist style views. Some involved the Socialist Alliance and respect accused the SWP of wanting to control the organisations, but this is in contradiction to its clearly stated, and often stated position, of wanting revolutionaries to be a minority in a mass [well at least big] working-class alliance.
there is so much distrust going in all directions, I am not picking on anyone in particular, that I don't think United left is possible. I am quite glad Socialist worker seems to have moved away from this line with the expulsion of John Reese Lindsey German, etc. [though very sorry to loose such fine comrades.]
If Anarchist's seem more united wherever you are, good. Get involved with them, and do stuff.