The Wall Street Journal recently carried a piece by Aneel Karnani, associate professor of strategy at the University of Michigan's Stephen M Ross School of Business...[who] has turned his attention to an attack against corporate social responsibility generally...[His] line of argument is simply the most recent expression of the rationale that goes back to Milton Friedman. It has the illusion of being based on mathematical certainty - where there is no such thing - and carries a value judgement that we have a duty to question. [refers to Anglo American, Ford, Marks & Spencer, Wal-Mart]