However, stakeholders must do more in order to achieve the 2030 Agenda and its aim to leave no one behind. Flows to least developed countries (LDCs) increased by more than 10 per cent, but this rise mostly reflected humanitarian emergencies in a few countries. More detailed reporting and disaggregation would help improve monitoring and guide policy interventions to ensure no one is left behind. In addition, mapping ODA flows to the Sustainable Development Goals (SDGs) can be a helpful monitoring tool and focus attention on areas that can accelerate the achievement of all SDGs. There has been progress in untying aid, but informal tying remains. There is an urgent need to address these challenges to the quality of ODA, which, taken together, pose a threat to hard-won gains in country ownership and leadership.