THE battle to save the world is an arduous and paradoxical one. Today's most visible scourge of globalisation and brands is herself an inexhaustible globetrotting brand: a 32-year-old Canadian journalist, armed with little more than a portable computer, a plane ticket and Internet access. Naomi Klein is the pre-eminent figure (she would deplore the term “leader”) in a worldwide protest movement against companies, free trade and global integration—in effect, against capitalism—that has no name or organisation, but is the most vigorous expression of leftist sentiment since the 1960s. The movement burst on to the scene in Seattle in December 1999,...