This review essay surveys the theoretical insights emerging from within the Global Justice and Solidarity Movement, also known as the Anti-Globalisation Movement, or the Movement of the Movements, and also reviews the literature focused on this phenomenon by those closely involved, as well as other observers. The central concern is to understand the nature and significance of the Movement of the Movements as it operates across local, national, and global boundaries, and to consider its capacity to represent and mobilise the many millions worldwide who stand to gain little or nothing, but may lose a great deal, from neo-liberal globalisation.