Just after the first anniversary of the onset of the Arab Spring, the Obama administration announced in December an enormous arms sale to Saudi Arabia, with a price tag greater than the annual gross domestic product of more than half the countries in the world. The administration hailed the sale as a "historic achievement" that "reinforces the strong and enduring relationship between the United States and Saudi Arabia."

The close juxtaposition of the anniversary and the apparent repair of the temporary rough patch in U.S.-Saudi relations highlights crucial overlooked realities about the Arab Spring and the U.S. response.

Although accounts of the Arab Spring often refer to a wave of political change washing across the Middle East, the reality is otherwise. The wave has bisected the region, swamping one half while leaving the other barely damp. Governments in the majority of the region's republics, namely Tunisia, Egypt, Libya, Syria and Yemen, have been toppled or have faced serious domestic siege. In startling contrast, however, all of the region's monarchies appear secure, with the possible exception of Bahrain. Most have enough oil money to keep their citizens well off, and some have a special religious legitimacy.