Via The Killing Train, I found this interesting article (apparently written sometime ago) which posits the existence of a phenomenon the authors call 'activistism'. This seems to describe a propensity to engage in unreflective activism amongst many on the American left. For what it's worth I think at least some of what they say can also be applied in the UK, particularly to the Stop the War Coaition. Understandably the Coalition has sought to remain as broad as possible, however, at times this has been at the expense of producing useful analysis of what is going on, preferring instead to focus on sloganeering. Recently Iraq Occupation Focus have gone someway to correcting this.