The 72nd meeting of the Bilderberg group, the elite and secretive policy conference that is the longtime subject of endless conspiracy theories, was held at the weekend in Washington DC. A security cordon went up around the opulent Salamander hotel for the notoriously media-shy summit, which was packed as ever with prime ministers, military leaders, tech billionaires and the heads of giant investment companies.

Bilderberg, which since the 1950s has been the intellectual engine room of Nato, took place this year at a time of immense crisis and uncertainty for the alliance. In recent weeks, with Trump threatening at every turn to withdraw from the “paper tiger” of Nato, the “Trans-Atlantic Defence-Industrial Relationship” (as it’s called on the agenda) has reached a strained breaking point.

The head of Nato and Bilderberg regular Mark Rutte arrived at the conference fresh from a “very frank” conversation at the White House. But away from Trump’s bluster, and for all his rhetoric about abandoning Nato, there were no signs that the Americans are withdrawing from Bilderberg. Far from it – the Americans were there in force.

Wall Street titans, including the CEOs of KKR and Lazard, and the heads of huge corporations like Pfizer, met behind closed doors with a delegation of senior politicians close to the president. Big business lobbying in private is Bilderberg’s speciality, and this secretive mix of the private and public sectors fits perfectly with Trump’s brand of crony-capitalism.

Trump’s trusted secretary of the interior, Doug Burgum, was attending, alongside his favourite trade guru, Robert Lighthizer. They were joined by Trump’s economic ally Jason Smith, the chair of the influential House ways and means committee, and his secretary of the army, Dan Driscoll, known as Trump’s “drone guy”.

It was no surprise with the conflict in Iran dominating the global news cycle that this year’s conference had a wartime flavour: with the “Future of Warfare” on the agenda, and a participant list including the four-star admiral Samuel Paparo, head of the US Indo-Pacific Command. From the private sector there was a healthy contingent of military contractors and drone manufacturers, led by the Bilderberg insider Eric Schmidt, who’s the former head of Google and a keen evangelist for drone warfare.

Earlier this year, Schmidt told the FT that “future wars are going to be defined by unmanned weapons”, with “swarms of drones operated remotely and increasingly automated with AI targeting”. Thriving in this rich overlap between drones and AI are companies like Anduril Industries, whose co-founder and CEO, Brian Schimpf, is attending the Washington conference, alongside his collaborator in Trump’s “Golden Dome” project, Palantir’s CEO, Alex Karp.

Karp is close to fellow billionaire tech-bro Peter Thiel, whose name, remarkably, is absent from this year’s participant list. Thiel has been a member of the group’s steering committee since 2008, and it was unheard of for him to miss a Bilderberg. Thiel’s reach runs deep into the Trump administration, and his influence within Bilderberg has also been growing through the years. Through the American Friends of Bilderberg Inc, he largely funds the lavish Washington-based meetings, alongside fellow steering committee member and billionaire Schmidt.

Thiel operates in the powerful liminal area between big finance and big intelligence – most notably, he set up Palantir with the help of funding from the CIA. This shady intersection was the birthplace of Bilderberg, and is baked into its history: the group was set up by British and American intelligence, and there’s always a handful of spy chiefs at the conference. This year, three intelligence directors were present, including the head of MI6, Blaise Metreweli. It is a fascinating backstage world which Thiel will now miss along with the strategising, the talent spotting and the big ideological discussions on “China” and “the west”.

It was no small thing for the arch-networker Thiel to skip Bilderberg. After all, Bilderberg is all about the chance to stay three steps ahead with all that lovely, off-the-books access to policymakers such as breakfast with the president of Finland, tea with the head of the IMF, and cocktails with the King of Holland.

Quite why the press fails so spectacularly to talk about Bilderberg, such a major annual summit with so many senior politicians present, is an enduring mystery. This year’s conference had plenty of newsworthy aspects, not least the presence of Vivian Motzfeldt, the former Greenlandic foreign minister and ex-speaker of the Inatsisartut (Greenland’s parliament).

Motzfeldt was the first Greenlander to appear at Bilderberg, and her presence was a clear signal to the Trump administration that Greenland has powerful allies within the Trans-Atlantic partnership. Motzfeldt no doubt contributed to the session on “Arctic Security”, and might even have been moved to quote the final sentence of Trump’s recent anti-NATO vent: “REMEMBER GREENLAND, THAT BIG, POORLY RUN, PIECE OF ICE!!!”

But as there was no press oversight for this conference, it is something that we will probably never know.