It should be apparent that the belief in objectivity in journalism, as in other professions, is not just a claim about what kind of knowledge is reliable. It is also a moral philosophy, a declaration of what kind of thinking one should engage in, in making moral decisions. It is, moreover, a political commitment, for it provides a guide to what groups one should acknowledge as relevant audiences for judging one's own thoughts and acts.
Discovering The News: A Social History Of American Newspapers (ed. Basic Books, 1981) - ISBN: 9780465016662