Contributor(s): Dr Mathias Koenig-Archibugi, Dr Devika Hovell, Dr Martin Binder | Multilateralism seems in crisis precisely when it is needed most. Challenges are multifaceted and originate from established, emerging and declining powers. In his address to the UN Security Council in April 2022, President Zelenskyy of Ukraine said: “It is now clear that the goals set in San Francisco in 1945 during the creation of a global international security organization have not been achieved. And it is impossible to achieve them without reforms. Therefore, we must do everything in our power to pass on to the next generations an effective UN with the ability to respond preventively to security challenges and thus guarantee peace.” What reforms could revitalise the UN and what are the prospects of them being enacted?