<P>Europe has suffered a decade of crises, with sovereign-debt troubles leading to austerity policies that exacerbated divisions inside member states and between them. Thereafter the Union was confronted with the challenges posed by a revanchist Russia in Ukraine and by a surge in migration from the Middle East and other conflict zones. The June 2016 UK vote to leave the Union threatened further damage to an institution that acknowledges it has failed to punch its weight in the spheres of foreign, defence and security policy. While that is a chronic shortcoming, its impact is becoming more acute as economic power moves East and Europe can no longer count on the steadfast support and leadership of the United States. The costs of Europe¿s failure to achieve strategic coherence and effect are steadily rising. This Adelphi book addresses the consequences of Europe¿s multiple crises for its standing as a strategic actor, acknowledging its unique character and capabilities. It argues that st