After many years of gradually closer ties between Russia and the European Union (EU), this relationship has taken a turn for the worst, signaling possibly the darkest era in security on the continent since the end of the Cold War. Indeed, at the beginning of the 21st century, it was almost taken for granted that Russia, under Vladimir Putin's leadership, was gradually moving closer to the West and valued its relationship to the North Atlantic Treaty Organization (NATO). Many observers pointed to Russia's strategic partnership with the West, 1 and there was even talk of Russia's future possible membership in NATO, or even the EU. However, this trajectory began a sharp slide backward as a result of the Russo-Georgian War in 2008, with major implications for Europe, the US, and even the liberal world order at large. 2 Indeed, the international system today is transforming. The liberal world order is coming under threat on various fronts with the rise and growth of nondemocratic states, violent and criminal nonstate actors, asymmetric conflict, and cyber war, among other things. 3 What is perhaps most surprising, as John Ikenberry points out, is that the biggest threat to the liberal world order actually stems from the most powerful "hostile revisionist power . . . it has begun to sabotage the order it created . . . it sits in the Oval Office, the beating heart of the free world. " 4 With this climate of uncertainty and insecurity, many states are reverting to less cooperative forms of interaction in the international system, oftentimes resulting in crisis. The Russia-EU relationship is one of the central dynamics behind the emergence of this less stable system. For the EU, increasing Russian aggression and disregard for international law through its encroachments