The present volume focuses on the jurisprudence of national, supranational and international jurisdictions (and quasi-juridictions) as regards the legal status of same-sex couples. Its aim is to explore the content, rationale, functioning and potential of the different jurisdictions' reasonings and their contribution to the strengthening of LGBTI rights (and duties). As a consequence, the book tries to convey the complexities and controversies that derive from the judicial recognition of same-sex couples across the world, taking always into account the relationship of the judiciary with the executive and the legislature and the related problems of legitimacy and democracy. The volume deals with this issue and considers it as a crucial test for modern democracies and contemporary societies.