The End of Imperialism. That’s right. Imperialism provided much of Africa, Asia and Latin America with security and administrative order. The Europeans divided the planet into a gridwork of entities — both artificial and not — and governed. It may not have been fair, and it may not have been altogether civil, but it provided order. Imperialism, the mainstay of stability for human populations for thousands of years, is now gone.
The End of Post-Colonial Strongmen. Colonialism did not end completely with the departure of European colonialists. It continued for decades in the guise of strong dictators, who had inherited state systems from the colonialists. Because these strongmen often saw themselves as anti-Western freedom fighters, they believed that they now had the moral justification to govern as they pleased. The Europeans had not been democratic in the Middle East, and neither was this new class of rulers. Hafez al Assad, Saddam Hussein, Ali Abdullah Saleh, Moammar Gadhafi and the Nasserite pharaohs in Egypt right up through Hosni Mubarak all belonged to this category, which, like that of the imperialists, has been quickly retreating from the scene (despite a comeback in Egypt).
No Institutions. Here we come to the key element. The post-colonial Arab dictators ran moukhabarat states: states whose order depended on the secret police and the other, related security services. But beyond that, institutional and bureaucratic development was weak and unresponsive to the needs of the population — a population that, because it was increasingly urbanized, required social services and complex infrastructure. (Alas, urban societies are more demanding on central governments than agricultural ones, and the world is rapidly urbanizing.) It is institutions that fill the gap between the ruler at the top and the extended family or tribe at the bottom. Thus, with insufficient institutional development, the chances for either dictatorship or anarchy proliferate. Civil society occupies the middle ground between those extremes, but it cannot prosper without the requisite institutions and bureaucracies.
Feeble Identities. With feeble institutions, such post-colonial states have feeble identities. If the state only means oppression, then its population consists of subjects, not citizens. Subjects of despotisms know only fear, not loyalty. If the state has only fear to offer, then, if the pillars of the dictatorship crumble or are brought low, it is non-state identities that fill the subsequent void. And in a state configured by long-standing legal borders, however artificially drawn they may have been, the triumph of non-state identities can mean anarchy.
Doctrinal Battles. Religion occupies a place in daily life in the Islamic world that the West has not known since the days — a millennium ago — when the West was called “Christendom.” Thus, non-state identity in the 21st-century Middle East generally means religious identity. And because there are variations of belief even within a great world religion like Islam, the rise of religious identity and the consequent decline of state identity means the inflammation of doctrinal disputes, which can take on an irregular, military form. In the early medieval era, the Byzantine Empire — whose whole identity was infused with Christianity — had violent, doctrinal disputes between iconoclasts (those opposed to graven images like icons) and iconodules (those who venerated them). As the Roman Empire collapsed and Christianity rose as a replacement identity, the upshot was not tranquility but violent, doctrinal disputes between Donatists, Monotheletes and other Christian sects and heresies. So, too, in the Muslim world today, as state identities weaken and sectarian and other differences within Islam come to the fore, often violently.
Information Technology. Various forms of electronic communication, often transmitted by smartphones, can empower the crowd against a hated regime, as protesters who do not know each other personally can find each other through Facebook, Twitter, and other social media. But while such technology can help topple governments, it cannot provide a coherent and organized replacement pole of bureaucratic power to maintain political stability afterwards. This is how technology encourages anarchy. The Industrial Age was about bigness: big tanks, aircraft carriers, railway networks and so forth, which magnified the power of big centralized states. But the post-industrial age is about smallness, which can empower small and oppressed groups, allowing them to challenge the state — with anarchy sometimes the result.