DEVOLUTION IS NATIONALISM:

The Arab Spring was the kindling. Arabs not only wanted to oust dictators, they wanted power decentralized to reflect local identity or rights to resources. Syria then set the match to itself and conventional wisdom about geography.

New borders may be drawn in disparate, and potentially chaotic, ways. Countries could unravel through phases of federation, soft partition or autonomy, ending in geographic divorce.

Libya's uprising was partly against the rule of Col. Muammar el-Qaddafi. But it also reflected Benghazi's quest to separate from domineering Tripoli. Tribes differ. Tripolitanians look to the Maghreb, or western Islamic world, while Cyrenaicans look to the Mashriq, or eastern Islamic world. Plus, the capital hogs oil revenues, even though the east supplies 80 percent of it.

So Libya could devolve into two or even three pieces. The Cyrenaica National Council in eastern Libya declared autonomy in June. Southern Fezzan also has separate tribal and geographic identities. More Sahelian than North African in culture, tribes and identity, it could split off too.

Other states lacking a sense of common good or identity, the political glue, are vulnerable, particularly budding democracies straining to accommodate disparate constituencies with new expectations.

After ousting its longtime dictator, Yemen launched a fitful National Dialogue in March to hash out a new order. But in a country long rived by a northern rebellion and southern separatists, enduring success may depend on embracing the idea of federation -- and promises to let the south vote on secession.

A new map might get even more intriguing. Arabs are abuzz about part of South Yemen's eventually merging with Saudi Arabia. Most southerners are Sunni, as is most of Saudi Arabia; many have family in the kingdom. The poorest Arabs, Yemenis could benefit from Saudi riches. In turn, Saudis would gain access to the Arabian Sea for trade, diminishing dependence on the Persian Gulf and fear of Iran's virtual control over the Strait of Hormuz.

The most fantastical ideas involve the Balkanization of Saudi Arabia, already in the third iteration of a country that merged rival tribes by force under rigid Wahhabi Islam. The kingdom seems physically secured in glass high-rises and eight-lane highways, but it still has disparate cultures, distinct tribal identities and tensions between a Sunni majority and a Shiite minority, notably in the oil-rich east.

Social strains are deepening from rampant corruption and about 30 percent youth unemployment in a self-indulgent country that may have to import oil in two decades. As the monarchy moves to a new generation, the House of Saud will almost have to create a new ruling family from thousands of princes, a contentious process.

Other changes may be de facto. City-states -- oases of multiple identities like Baghdad, well-armed enclaves like Misurata, Libya's third largest city, or homogeneous zones like Jabal al-Druze in southern Syria -- might make a comeback, even if technically inside countries.

A century after the British adventurer-cum-diplomat Sir Mark Sykes and the French envoy François Georges-Picot carved up the region, nationalism is rooted in varying degrees in countries initially defined by imperial tastes and trade rather than logic. The question now is whether nationalism is stronger than older sources of identity during conflict or tough transitions.

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