Between Ostpolitik and Self-Defense: Germany's Iran Entanglement

3.4 billion euros. That was the value of goods that moved between Germany and Iran in 2017, the peak year of the post-JCPOA honeymoon. It made Germany Iran's largest trading partner in Europe, ahead of Italy and France. Two years later, after Washington pulled out of the nuclear deal, the figure had fallen by more than half. The trade is largely gone. The political posture it created is not.

When Israeli ambassador Ron Prosor calls Frank-Walter Steinmeier's stance on the Iran war "a dream for the Moscow-Tehran axis," the accusation sounds personal. It is not. Steinmeier's position is the output of a machine that the Social Democratic Party built over fifty years, funded by billions in bilateral trade, and staffed by an entire diplomatic apparatus that was designed for engagement, not deterrence.

The Brandt Inheritance

The machine started in 1969. Willy Brandt, then chancellor, launched Ostpolitik on a simple bet: trade and dialogue could change authoritarian regimes more effectively than isolation. Egon Bahr, his closest advisor, coined the phrase "Wandel durch Annäherung" - change through rapprochement. Brandt won the Nobel Peace Prize in 1971. More importantly for what followed, he won the argument inside the SPD.

Every subsequent SPD leader applied Brandt's template to the threat of the decade. Helmut Schmidt maintained dialogue with Moscow even as NATO deployed Pershing II missiles in the early 1980s. Gerhard Schröder deepened economic ties with Russia to the point of joining Nord Stream AG's board after leaving office. The adversary changed; the doctrine did not.

Frank-Walter Steinmeier is the purest product of this lineage. He served as chief of staff in Schröder's chancellery during the years of maximum Russia engagement, then as foreign minister from 2005 to 2009 and again from 2013 to 2017. By the time the Iran nuclear talks reached their critical phase, Steinmeier had spent two decades inside a foreign policy apparatus that treated dialogue as its primary instrument.

Steinmeier's JCPOA Bet

Germany was the only country at the JCPOA negotiating table that did not hold a permanent seat on the UN Security Council. The five permanent members - the US, UK, France, Russia, and China - were there by institutional right. Germany was there because of its economic leverage.

When the deal was signed in Vienna on 14 July 2015, Steinmeier was present. He had personally attended the final negotiation rounds. The JCPOA represented the triumph of exactly the approach the SPD had championed since Brandt: patient multilateral diplomacy backed by economic incentives, producing a verifiable agreement without a single shot fired.

Donald Trump's withdrawal from the JCPOA in May 2018 did not just collapse a nuclear agreement. It collapsed the validation of Steinmeier's entire foreign policy worldview. The wound still shapes his public statements.

Following the Money

The trade numbers tell the story of how economic engagement became diplomatic infrastructure. German exports to Iran consisted primarily of machinery, chemical products, and automotive components - exactly the sectors where German industry holds global market share. The relationship was not marginal. It was structurally embedded.

At its centre sat the Europäisch-Iranische Handelsbank (EIH) in Hamburg. Founded in 1971, the same year Brandt won his Nobel Prize, EIH was the financial artery connecting German industry to the Iranian market. When most European banks withdrew from Iran business under sanctions pressure, EIH remained the last reliable payment channel on the continent.

The bank's history mirrors the diplomatic arc precisely. The EU sanctioned EIH in 2011 over concerns about nuclear proliferation financing. After the JCPOA, the sanctions were lifted in 2016. After Trump's withdrawal, business collapsed again. Major German companies - Siemens, BASF, Daimler, Volkswagen - had invested years in building Iran market positions. They abandoned them within months of the US reimposing sanctions, not because of EU policy but because secondary sanctions made dollar-denominated business impossible.

The Path Dependency Trap

Billions in trade create political constituencies. The Nah- und Mittelost-Verein (NUMOV), Germany's oldest Middle East business association, and industry lobby groups spent years pushing for sanctions relief and trade facilitation. The Foreign Ministry built dedicated Iran coordination capacity. German universities maintained exchange programmes. Cultural institutes stayed open.

This is path dependency in its textbook form: every year of institutional investment raises the cost of reversing course. The political apparatus was not built to confront Iran. It was built to engage Iran. When the strategic landscape shifted, the apparatus resisted the change because that is what institutions do.

Germany experienced the identical dynamic with Russia. Decades of Wandel durch Handel had woven Russian gas so deeply into Germany's energy infrastructure that Berlin's initial response to the February 2022 invasion was hesitant. The country imported roughly 55 percent of its natural gas from Russia. Nord Stream 2, a pipeline Steinmeier had personally championed, was halted only two days before Russian tanks crossed the Ukrainian border.

The Russia Lesson Not Learned

The SPD acknowledged its Russia failure. At its 2022 party conference, senior figures admitted that the party's engagement doctrine had been exploited by Moscow. Chancellor Olaf Scholz declared a "Zeitenwende" - a turning point in German security policy.

But no comparable reckoning has taken place for Iran. The SPD has not conducted an internal review of whether the same engagement logic that failed with Russia also applies to Tehran. The JCPOA remains, in party memory, a success that was sabotaged by Washington rather than a bet that was structurally flawed.

This asymmetry is significant. When Steinmeier describes the Iran war as a violation of international law, he is not making an abstract legal argument. He is defending the framework within which his largest diplomatic achievement made sense. Abandoning that framework means admitting that the achievement was always fragile.

Why the Default Is Diplomacy

Germany defaults to diplomacy with Iran not out of idealism but because its political infrastructure was built for it. The Parlamentsvorbehalt - the constitutional requirement that the Bundestag must approve any deployment of German armed forces - acts as a structural brake on hawkish pivots. Even if a chancellor wanted to support military action against Iran, the parliamentary hurdle makes rapid escalation nearly impossible.

The economic ties have withered. German-Iranian trade sits at a fraction of its 2017 peak. But the diplomatic reflexes remain intact: the institutional memory, the personal networks, the conviction that talking is always preferable to not talking. Steinmeier embodies these reflexes not because he is naive but because he is the most senior product of a system that spent fifty years perfecting them.

The question facing Germany is whether it can afford to learn the same lesson twice. The Russia precedent suggests the cost of late recognition is high. The Iran file remains open.