The United Nations Security Council, the UN’s most powerful body tasked to maintain international peace and security, is failing in its mandate. Its rigid institutional setting, the privileged status of core UN members, and the continuing lack of voice of many countries, have increased the risk of dramatic and systemic failures and shaken the legitimacy and centrality of the UN in the international system. This paper proposes a new solution in the stalled reform debate: a system of collective representation in the Council with nine total seats for all the UN members. States themselves would be able to group autonomously in an expected regional logic, all of them free to discipline themselves. The veto power will be retained by the group that is subject to a resolution, on a case-by-case basis. This potentially lasting reform brings flexibility and new political responsibility to the UNSC, compelling countries to act through more positive regional dynamics.