As the world's largest regional arrangement under Chapter VIII of the UN Charter, the OSCE also contributes to global security through regional conflict prevention and crisis management. In his introductory chapter, OSCE Secretary General Thomas Greminger addresses the question of how the OSCE can also contribute to the achievement of the 17 goals of the United Nations for sustainable development. The OSCE Yearbook 2019 also includes articles on domestic political developments in countries such as Armenia and Kazakhstan, OSCE conflict management in the South Caucasus and the work of the OSCE Special Monitoring Mission to Ukraine. There are also contributions on the monitoring of freedom of assembly by the OSCE Office for Democratic Institutions and Human Rights and the link between climate change and security, as well as the integration of heterogeneous societies as a means of conflict prevention. Facts and figures on the 57 participating states as well as a current selection of research literature complete the volume.