One of the most dramatic changes in world politics has been the rise to prominence of citizen networks. Among the many factors responsible for their emergence are new communication technologies, and in particular the World-Wide Web. Opinions on the nature and significance of these citizen networks, however, are mixed. Some applaud citizen networks as potential counter-hegemonic forces and expressions of democratic participation. Others see them, on the contrary, as undemocratic and largely destructive. Straddling both of these views is a third argument that suggests "real" communities cannot be sustained on the Internet, hence calling into question the long-term viability of citizen networks as actors on the world political stage. To help push these debates further, this article examines the case of the citizen networks that emerged to lobby against the Multilateral Agreement on Investments, focusing in particular on how the Internet played a part in the opposition movement. The case suggests that, contrary to those who see new media as an obstacle to global citizen etworks, the Internet and World-Wide Web greatly facilitated their activities. As a consequence, citizen networks will likely continue to grow and expand, intruding into international policymaking processes. The article concludes by examining several global public policy issues that are raised by this shift in the landscape of world politics that will have to be addressed by practitioners of international relations in years to come.