Analysing the geopolitical vision of EU external energy policy, exemplified by the Southern Gas Corridor (SGC), this study places emphasis on how geopolitical discourse and thinking have influenced EU policymaking. It starts from the dominant view that the Russia-Ukraine gas crises have caused energy security to be featured highly on the EU's agenda. Accordingly, the European Commission has outlined different measures to ensure supply security, one of which is the diversification of routes and sources through the Caspian region. Taking up the conceptual perspective of critical geopolitics, the book analyses the European Commission's geopolitical reasoning. It observes that the proposed policy solution of diversifying gas supply and routes through the SGC has turned into a publicly accepted narrative in Commission discourse.