Keep Calm and Carry On: that’s not how people felt as the second world war loomed. But maybe, as Trump stalks, that old slogan is finally making sense

It has become known as the “war of nerves”. An apt name for a jittery, jangling time in British history, consumed with fear of what may be coming, in which the sheer unpredictability of life became – as the historian Prof Julie Gottlieb writes – a form of psychological warfare. Contemporary reports describe “threats of mysterious weapons, gigantic bluff, and a cat-and-mouse game intended to stampede the civilian population of this island into terror”.

It all sounds uncannily like life under Donald Trump, who this week marched the world uphill to war, only to amble just as inexplicably back down again. But Gottlieb is actually describing the period between the Munich crisis of 1938 and the blitz beginning in earnest in September 1940. Her fascinating study of letters, diaries and newspapers from the period focuses not on the big geopolitical picture but on small domestic details, and what they reveal about the emotional impact of living suspended between peace and war: companies advertising “nerve tonics” for the anxious, reports of women buying hats to lift their spirits and darker accounts of nervous breakdowns. We did not, contrary to popular myth, all Keep Calm and Carry On. Suicide rates, she notes, rose slightly.

In the UK and Ireland, Samaritans can be contacted on freephone 116 123, or email jo@samaritans.org or jo@samaritans.ie. In the US, you can call or text the National Suicide Prevention Lifeline on 988, chat on 988lifeline.org, or text HOME to 741741 to connect with a crisis counselor. In Australia, the crisis support service Lifeline is 13 11 14. Other international helplines can be found at befrienders.org

Gaby Hinsliff is a Guardian columnist

Intimate correspondence between John Cairncross and Gloria Barraclough features in National Archives exhibition

It was a love letter written by one of the more important British spies of the cold war that made Tom Brass realise he had never fully known his mother.

The spy in question was John Cairncross, the alleged fifth man in the Cambridge spy ring, whose spycraft also helped the Soviets win the Battle of Kursk and turn the tide of the second world war.

The global economic system doesn’t even benefit its US and European creators any more – let alone indebted nations or emerging giants

Donald Trump represents everything that the Davos crowd hates – and it is unlikely they are any more well-disposed towards him after being forced to listen to more than an hour of the president’s rambling speech today. He is a protectionist, not a free trader. He thinks the climate crisis is a hoax and is suspicious of multilateral organisations. He prefers power plays to dialogue and he doesn’t have any time for the “woke” capitalism that Davos has been keen to promote, with its focus on gender equality and ethical investment. The shindig’s organisers, the World Economic Forum (WEF), had to agree to sideline those issues in order to secure Trump’s appearance.

For decades, anti-globalisation protesters have sought to shut down the WEF. Thanks to Trump’s threat to take over Greenland, their prayers may soon be answered. In today’s world, Davos is an irrelevance and it seems fitting that Trump should be on hand this week to deliver the coup de grace to the liberal international rules-based order that the WEF prides itself on upholding.

We are in 1942 Stuttgart – though the sight of modern wheelie bins says otherwise – as a woman at a facility dedicated to breeding Aryan babies tries to smuggle two Jewish children to safety

This second world war-set drama should not be confused with a famous unrealised film project of similar name. That one is the Holocaust-themed feature based on the novel Wartime Lies by Louis Begley that Stanley Kubrick tinkered with for years before finally abandoning; Suspiria director Luca Guadagnino is now rumoured to be trying to get it off the ground. Like the Kubrick/Guadagnino, this Aryan Papers, written and directed by ultra-low-budget film-maker Danny Patrick (The Film Festival, The Irish Connection), takes its name from the Nazi-issued certificate, also known as the Ariernachweis, which people were compelled to carry during those dark times to prove they weren’t Jews, Roma or from another persecuted minority.

Apparently, Kubrick abandoned his Aryan Papers in part because he feared it wouldn’t do as well at the box office if it came out after Schindler’s List – just as Full Metal Jacket appeared to have been eclipsed by Platoon. Fortunately for Guadagnino, no matter if and when his Aryan Papers comes out, he will have little to worry about with regards to Patrick’s film, a work that with any luck will be forgotten by next week. Like the embarrassingly bad comedy The Film Festival (AKA The Worst Film Festival Ever), this is a shockingly poor effort on just about every level, from the inept, back-of-a-beer-mat script, the lazy use of obviously not-German, non-period-proofed locations (a modern plastic wheelie bin is visible in several shots), to the frankly insultingly bad acting throughout.