Humanity faces a multitude of global challenges, above all the need to create a sustainable, just and peaceful global civilization that respects planetary boundaries and preserves life on Earth. The present existential global threats can only be tackled if global institutions and political processes are strengthened and renewed. They must derive their legitimacy from the people and empower them to work together for the global common good and future generations. This requires implementing democratic representation and participation at the global level. To initiate this democratization and strengthening of global governance, this study calls for the creation of a UN Parliamentary Assembly and presents official recommendations of Democracy Without Borders.