Moore's documentaries definitely helped a lot of people move left, and he's on the right side of history for the most part, but he's one of those socdems, who no matter how many times the Dems disappoints, he just won't break with them. I think it was his movie about the US healthcare, there was a segment on Obama, and he presented Obama as some World changer. I remember watching some of his interviews when he was out promoting that movie, and he said if Obama disappointed, he would be done with the Dems, but alas here we are and he's still shilling for the Dems.