It was March 21, 2003—two days after the United States began its “shock and awe” campaign against Iraq—and the story dominating TV networks was the rumor (later proven false) that Saddam Hussein’s infamous cousin, Ali Hassan al-Majid (“Chemical Ali”), had been killed in an airstrike. But, for thousands of other people around the world who switched on their computers rather than their television sets, the lead story was the sudden and worrisome disappearance of Salam Pax.

Otherwise known as the “Baghdad Blogger,” Salam Pax was the pseudonym for a 29-year-old Iraqi architect whose online diary, featuring wry and candid observations about life in wartime, transformed him into a cult figure. It turned out that technical difficulties, not U.S. cruise missiles or Baathist Party thugs, were responsible for the three-day Salam Pax blackout. In the months that followed, his readership grew to millions, as his accounts were quoted in the New York Times, BBC, and Britain’s Guardian newspaper. If the first Gulf War introduced the world to the “CNN effect,” then the second Gulf War was blogging’s coming out party. Salam Pax was the most famous blogger during that conflict (he later signed a book and movie deal), but myriad other online diarists, including U.S. military personnel, emerged to offer real-time analysis and commentary.

Blogs (short for “weblogs”) are periodically updated journals, providing online commentary with minimal or no external editing. They are usually presented as a set of “posts,” individual entries of news or commentary, in reverse chronological order. The posts often include hyperlinks to other sites, enabling commentators to draw upon the content of the entire World Wide Web. Blogs can function as personal diaries, political analysis, advice columns on romance, computers, money, or all of the above. Their number has grown at an astronomical rate. In 1999, the total number of blogs was estimated to be around 50; five years later, the estimates range from 2.4 million to 4.1 million. The Perseus Development Corporation, a consulting firm that studies Internet trends, estimates that by 2005 more than 10 million blogs will have been created. Media institutions have adopted the form as well, with many television networks, newspapers, and opinion journals now hosting blogs on their Web sites, sometimes featuring dispatches from their own correspondents, other times hiring full-time online columnists.

Blogs are already influencing U.S. politics. The top five political blogs together attract over half a million visitors per day. Jimmy Orr, the White House Internet director, recently characterized the “blogosphere” (the all-encompassing term to describe the universe of weblogs) as instrumental, important, and underestimated in its influence. Nobody knows that better than Trent Lott, who in December 2002 resigned as U.S. Senate majority leader in the wake of inflammatory comments he made at Sen. Strom Thurmond’s 100th birthday party. Initially, Lott’s remarks received little attention in the mainstream media. But the incident was the subject of intense online commentary, prodding renewed media attention that converted Lott’s gaffe into a full-blown scandal.

Political scandals are one thing, but can the blogosphere influence global politics as well? Compared to other actors in world affairs—governments, international organizations, multinational corporations, and even nongovernmental organizations (NGOs)—blogs do not appear to be very powerful or visible. Even the most popular blog garners only a fraction of the Web traffic that major media outlets attract. According to the 2003 Pew Research Center for the People and the Press Internet Survey, only 4 percent of online Americans refer to blogs for information and opinions. The blogosphere has no central organization, and its participants have little ideological consensus. Indeed, an October 2003 survey of the blogosphere conducted by Perseus concluded that “the typical blog is written by a teenage girl who uses it twice a month to update her friends and classmates on happenings in her life.” Blogging is almost exclusively a part-time, voluntary activity. The median income generated by a weblog is zero dollars. How then can a collection of decentralized, contrarian, and nonprofit Web sites possibly influence world politics?

Blogs are becoming more influential because they affect the content of international media coverage. Journalism professor Todd Gitlin once noted that media frame reality through “principles of selection, emphasis, and presentation composed of little tacit theories about what exists, what happens, and what matters.” Increasingly, journalists and pundits take their cues about “what matters” in the world from weblogs. For salient topics in global affairs, the blogosphere functions as a rare combination of distributed expertise, real-time collective response to breaking news, and public-opinion barometer. What’s more, a hierarchical structure has taken shape within the primordial chaos of cyberspace. A few elite blogs have emerged as aggregators of information and analysis, enabling media commentators to extract meaningful analysis and rely on blogs to help them interpret and predict political developments.