The compartmentalization of conflicts by Obama and others was a necessary element for them to oppose the Bush administration’s war on terror because it was the only way to conceptually remove the common thread that held together Bush’s strategy. But that relied on the belief that the international state system was intact and robust enough to deal with international terrorism. It was a nice idea, but it proved naïve and dangerous.
Obama learned this when he sent forces into Pakistan to get Osama bin Laden. He learned it again when he had to send drones after Yemen-based terrorists. He learned and relearned it throughout the Arab Spring, as dictatorships fell and transnational terror networks like the Muslim Brotherhood rose. He learned it when weapons from the Libyan civil war fueled a military coup in Mali. He learned it when his administration practically begged the Russian government to accept American counterterrorism help to safeguard the Olympics in Sochi.