Howard Zinn tackles the biases of historians in this important book. His thesis, which he explores with case after case, is that historians employ a double-standard with regard to covering history, basically serving a propagandistic role in our society, camouflaging the bad deeds of business and government, even as they claim to be objective and neutral outsiders. It's a similar argument that's made with the media, and no less important here. He argues persuasively (and thoroughly) for a radical approach to history, changing the role of historian as sideline cheerleader for the status quo to active participant in true social change.