The European security order, built over decades and reinforced in the 1990s after the fall of the Iron Curtain, has been severely affected by the annexation of Crimea and the war in Donbas. Russia’s breach of its basic principles has had a major impact on security in Europe and has increased tensions between the West and Russia to a level unprecedented since the end of the Cold War. This Dialogue sought to discuss the state and prospects of the European security order. A distinguished panel discussed the extent to which the Ukraine crisis has exposed existing weaknesses in the European security order, and how the full implementation of the Minsk agreements might affect it. The Dialogue raised issues such as how arms control regimes could be reinstated, whether conflict over Ukraine is the main stumbling block in relations between the West and Russia and the extent to which there is a need for a “grand bargain” with Russia, or for various small agreements. Finally, which of the institutions addressing security in Europe could be reinforced, and what is the role for European states and for the European Union, as well as for the US, NATO and the OSCE?