In 2008–2011, the Group of 20 swiftly eclipsed the Group of 7, created in themid-1970s as an informal mechanism for stabilizing markets and facilitating transnational currency exchange and investment. Several observers have expressed the view that the former, broader group is also destined to appropriate the role of the Group of 8, the G7’s pioneering successor in the realm of nontraditional security. This article examines the G7/8 legacy of forgingquasi-permanent institutional arrangements and frameworks in this policy area and goes on to gauge nontraditional security initiatives subsequently launched by the G-20. Having juxtaposed the past record of these bodies and analyzed the interests and power dynamics that influence member stateaction in the short and long term, the article outlines three basic options for how the relationship between the G-20 and the G7/8 may evolve.