After the Bush administration, many believed that President Obama would bring stability to the global order with a fusion of eloquent rhetoric, a preference for multilateralism and a cautious approach to exercising the politico-military capabilities of the world’s sole superpower. For little more than that promise, it seems, Obama would be awarded the 2009 Nobel Peace Prize. Fast-forward to the end of the Obama era and the global security environment is more volatile than it has been in decades: Russian influence is surging in the Middle East and Europe, wars ravage civilian populations in Syria, Yemen and Iraq, waves of migrants are straining EU unity, while the jihadist threat has metastasised. It’s a legacy, fairly or otherwise, that may come to be defined by three quotes.