WASHINGTON — Where’s the next place to blow in the Arab revolution? Candidates are many, but there’s one whose geopolitical impact vastly exceeds its diminutive size — the island of Bahrain.

This is a place run by an oppressive and corrupt little regime, long coddled by Washington because the U.S. Navy’s Fifth Fleet is headquartered there. The future of the base is far from secure if the regime falls.

A few hard facts about the island that should give pause for thought:

First, Bahrain is a Shiite island. You won’t see it described that way, but it is — 70 percent of the population, more than the percentage of Shiites in Iraq. And like Iraq under Saddam Hussein, these Arab Shiites have been systematically discriminated against, repressed, and denied meaningful roles by a Sunni tribal government determined to maintain its solid grip on the country. The emergence of real democracy, as in Iraq, will push the country over into the Shiite column — sending shivers down the spines of other Gulf rulers, and especially in Riyadh.

Appearances are deceiving. Go to Bahrain and on the surface you won’t feel the same heavy hand that dominates so many other Arab authoritarian states. The island is liberal in its social freedoms. Expats feel at home — you can get a drink, go to nightclubs, go to the beach, party.