In the fall of 2020, diplomats at the UN gathered virtually to negotiate a resolution that would close out the 2020 Peacebuilding Architecture Review (PBAR), which assessed the UN’s implementation of sustaining peace – and hence prevention – since the last review in 2016. The secretary-general released his report on the review in September 2020, highlighting the importance of prevention, and making the case for progress over the past 4 years.