Nazi Germany

• He is on a secret mission to meet representatives of Britain’s ruling Labour party – including, he hopes, the recently elected prime minister, Ramsay MacDonald.
• The 38-year-old Matteotti, a tireless defender of workers’ rights, still hopes Mussolini can be stopped.
• For Matteotti, this new British government – the first to be led by Labour, although not as a majority – is a beacon of hope.

Four days in London

• Britain’s new prime minister was a working-class Scot who had made his way up via humble jobs and political activism.
• In contrast, Matteotti hailed from a wealthy family that owned 385 acres in the Polesine region of north-eastern Italy.

• The team is working with academics from different backgrounds who have been engaged in projects aimed at tackling societal and scientific challenges.
• But something else may have troubled Mussolini about Matteotti’s visit to London – part of a European tour that also included stops in Brussels and Paris.

Death of a socialist

• He had reportedly been working on this speech day and night, studying data and checking numbers for many hours.
• This secret group, known as Ceka after the Soviet political police created to repress dissent, had been following Matteotti for weeks.
• The squad’s leader, US-born Amerigo Dumini, reputedly boasted of having previously killed several socialist activists.
• Socialist MPs, alerted by Matteotti’s wife, denounced the MP’s disappearance – but were not altogether surprised by it.
• For a few days, it appeared that the resulting public outrage – much of it aimed at Mussolini himself – might even bring down Italy’s government, spelling the death knell for fascism.

Why was Matteotti murdered?

• His death can be seen as one of the most consequential political assassinations of the 20th century.
• Yet for the Italian right, Matteotti is a ghost.
• Throughout her political career, Italy’s current prime minister, Giorgia Meloni, has hardly ever spoken about the historical crimes of fascists in Italy, and not once about the murder of Matteotti.
• The historical debate about the murder has also never reached a unanimous conclusion about who gave the order to kill Matteotti and why.

The LSE documents

• The story of how the documents came to be secreted away in the LSE library takes us back to London for another clandestine visit – this time by Gaetano Salvemini, an esteemed professor of modern history who fled Italy in November 1925.
• In December 1926, while still in London, Salvemini received the secret package which he soon passed on to the LSE.
• But they were driven by the conviction that these documents could one day prove beyond doubt that Mussolini had orchestrated Matteotti’s assassination.
• Salvemini may thus have considered the LSE a safe haven – and there the documents have remained ever since.

A voice from the dead

• Rather, the move allowed Mussolini to legislate unchallenged while the seats of the 123 MPs who had joined the rebellion were left vacant.
• Matteotti’s article, entitled “Machiavelli, Mussolini and Fascism”, was a response to an article published in the magazine’s June issue by Mussolini himself.
• The Italian prime minister’s translated essay about the Renaissance intellectual Niccolò Machiavelli had carried the provocative headline “The Folly of Democracy”.
• The article was widely commented on in the British press, which had been following the story of Matteotti’s murder almost daily.
• His funeral was rushed through very quickly, with the coffin being transported overnight in an attempt to prevent public gatherings.

The end of Italian democracy

• In a speech to parliament on January 3 1925, he took “political responsibility” for the murder while not admitting to ordering it.
• Mussolini’s speech ended with a rhetorical invitation to indict him – to a parliament now populated only by fascists.
• The speech signalled the end of Italian democracy.
• The nature of Mussolini’s involvement was little discussed in the wake of his execution in April 1945 and the end of the second world war.
• Was it the evidence of the Mussolini government’s corruption that he planned to reveal to the Italian parliament the day after his kidnap?

For you: more from our Insights series:
India elections: ‘Our rule of law is under attack from our own government, but the world does not see this’

History’s crisis detectives: how we’re using maths and data to reveal why societies collapse – and clues about the future

How a little-known clergyman studying worms by candlelight in the 1700s inspired Charles Darwin – but didn’t get the credit he deserved

To hear about new Insights articles, join the hundreds of thousands of people who value The Conversation’s evidence-based news. Subscribe to our newsletter.

• He has also received funding from the Fondazione Giacomo Matteotti to study the LSE documents.
• Gianluca Fantoni does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.