This article examines the outcomes of collective forms of engagement in the ASEAN region. By examining how convening power in these south-south engagements has worked since the Bandung Conference, the paper reviews how the mode of consensus building adopted in 1955 has been channelled into regional cooperation. In particular, the paper considers the implications of these forms of cooperation for the consensus building that characterizes ASEAN today. The paper uses the processes evident in the ASEAN Development Outlook to set out the consequences of these findings for how the UN system can set out more effective criteria for global South cooperation. This has direct implications for institutional mechanisms for advancing capacity and expertise in new forms of cooperation between the global North and global South.