THE four stages of a political movement, as Gandhi told it, were: “First they ignore you, then they laugh at you, then they fight you, then you win.” For the whistle-blower Web site WikiLeaks, the release last week of secret field reports on the war in Afghanistan that it obtained from American military sources certainly looked like a victory. Not only did The New York Times, The Guardian and Der Spiegel devote hundreds of hours of reporters’ and editors’ time to analyzing and confirming the information in the documents, the three agreed to coordinate publication for last Monday, ensuring there...