ON JUNE 17th a hubbub of activists will gather in Rio de Janeiro for a conference on “good business for a sustainable future”, sponsored by something called the Ethical Fashion Initiative. They will listen to a farmer talking about the social consequences of cotton and a theologian debating the meaning of the word “value”. No doubt they will also admire Rio’s beautiful beaches and the beachgoers who waste “very few of the Earth’s precious resources on clothes”, as P.J. O’Rourke once put it.Corporate social responsibility (CSR) has a hard-earned reputation for flakiness. CSR types don’t just swap agreeable-sounding platitudes (“doing well by doing good”). They do so in agreeable places, “for the same reason that the American Association of Hose and Nozzle Manufacturers has to hold all its important meetings in Las Vegas,” observed Mr O’Rourke, a humorist. “Rio is, um, convenient to major air travel facilities.”Yet there is more to CSR than empty phrases and exotic conferences. Serious business gurus such as Michael Porter and the late C.K. Prahalad have lent their support to the movement. Most of the world’s big...

