One of the most important reasons why the U.S. is trying to conclude a nuclear deal with Iran is to prevent an Iranian bomb from triggering a nuclear race in the Middle East. Yet even as talks continue now in Switzerland, Tehran’s regional rivals have already begun quietly acting on their own atomic ambitions. Nuclear power may be on the wane almost everywhere else in the world, but it’s all the rage in the place with all that oil.

Egypt’s announcement last month that it was hiring Russia to build a reactor near Alexandria made it only the latest entrant in an emerging atomic derby. Every other major Sunni power in the region has announced similar plans. And though none appear either as ambitious nor as ambiguous as what’s taken place in Iran — which set out to master the entire atomic-fuel cycle, a red flag for a military program — each announcement lays down a marker in a region that, until recently, was notable as the one place on the planet where governments had made little progress on nuclear power.

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With the exception of Israel, which has never publicly acknowledged its widely known nuclear arsenal, no Middle Eastern country beyond Iran had a nuclear program — peaceful or otherwise — until the wealthy United Arab Emirates began building a reactor in July 2012 (due for completion in 2017). The list now includes, in addition to Egypt, Turkey, Jordan and Saudi Arabia — the last Iran’s archrival, and which last year revealed plans to build 16 nuclear plants over the next two decades. When the President of South Korea — which has 23 nuclear plants of its own — visited the Kingdom earlier this month, leaders of both countries signed a memo of understanding calling for Seoul to build two of the nuclear plants. The Saudis have made similar arrangements with China, Argentina and France.

“It’s not just because nuclear power is seen as a first step toward a nuclear-weapons option,” says Mark Fitzpatrick, a former U.S. State Department nuclear expert who now runs the nonproliferation and disarmament program at London’s International Institute for Strategic Studies. “There is also a prestige factor: keeping up with the neighbors.”

Middle Eastern nations may have legitimate reasons to invest in nuclear energy. Jordan, for instance, has almost no oil in liquid form, and almost less water. Saudi Arabia and the UAE possess huge crude reserves, but lose potential export revenue when they burn oil at home to create electricity — huge amounts of which are sucked up by desalination plants. Turkey, despite impressive hydroelectric potential, must import oil and natural gas.

But all that has been true for decades. What’s changed in recent years is the nuclear capabilities of Iran — a Shi‘ite Muslim country Sunni leaders have come to regard as major threat. Jordan’s King Abdullah II famously warned of a “Shia crescent” of Iran-aligned countries reaching from the Mediterranean to the Persian Gulf. The Saudis have made it clear that they will acquire a nuclear weapon should Iran get one.

“This is not the shortest way to a nuclear weapon, by any means,” says Sharon Squassoni, director of the proliferation-prevention program at the Center for Strategic and International Studies in Washington, D.C. “But if I put myself in their shoes, I’d think it probably makes sense to start down this path to see if we can develop a civilian nuclear [program], and if we pick up some capabilities along the way, that’s all right.”‘

Suspicion rises with every new announcement partly because the Middle East is bucking a global trend. Worldwide, the number of nuclear plants has declined since the meltdown at Japan’s Fukushima Daiichi plant in 2011. Reactions differed by country. Germany forswore nuclear energy altogether after the disaster, while China pressed ahead, planning more than 100 new reactors. But in most places, the environmental risks and high costs have turned countries off nuclear power.

“My beef with nuclear energy is that it’s sort of held up as this very prestigious thing,” Squassoni tells TIME. “We do nuclear deals with our best allies … all this stuff about strategic partnership. And really, it’s this extremely expensive, complicated, slightly dangerous way to boil water. And that’s what you’re doing, right? You’re boiling water to turn those turbines.”

The expense alone may prevent some Middle Eastern nations from every actually joining the “nuclear club.” Building an atomic plant costs at least $5 billion, Fitzpatrick notes, and Egypt is desperately poor; Jordan relies heavily on remittances and foreign aid. But the Saudis still have money to burn and, according to former White House official Gary Samore, have consistently rebuffed U.S. imprecations to sign a pledge not to divert any nuclear program toward producing a bomb (a pledge the UAE took). Saudi Arabia has signed the Nuclear Non-Proliferation Treaty, but then so has Iran, and in the end a race can be run by as few as two: India and Pakistan, bitter neighbors, neither of which are rich, went nuclear in 1974 and 1998, respectively. They’ve gone to war once since, raising anxiety levels around the world.

So the talks in Switzerland are about more than preventing Iran from getting the bomb. They are also about persuading Iran’s neighbors that the nuclear option is effectively off the table. If the talks end with a final agreement that looks like a win for the Islamic Republic, diplomats say its neighbors will fast track their own plans. “If the accord is not sufficiently solid then regional countries would say it’s not serious enough, so we are also going to get the nuclear weapon,” French Foreign Minister Laurent Fabius told Europe 1 Radio on Saturday. “And that would lead to an extremely dangerous nuclear proliferation.”

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