This book bridges the gap between academic researchers and policymaking experts working on the Western Balkans and those dealing with the Baltic States. Within the frame of a comparative and cross-regional approach, Vassilis Petsinis generates new insights in subjects as diverse as: how geopolitics shape the management of ethnic relations; the variants of Euroscepticism; opposition to immigration and LGBTQI rights; the patterns of multi-ethnic cohabitation; as well as the endeavour by parties of the populist and radical right to embed their platforms into the longer trajectories of ethno-nationalism in the countries and societies studied (Estonia and Latvia from the Baltic States; Croatia and Serbia from the