Welcome to the 2020s, the beginning of what history books might one day describe as the digital middle ages. Let’s briefly travel back to 2017. I remember sitting in various government buildings briefing politicians and civil servants about QAnon, the emerging internet conspiracy movement whose adherents believe that a cabal of Satan-worshipping elites runs a global paedophile network. We joked about the absurdity of it all but no one took the few thousand anonymous true believers seriously. Fast-forward to 2023. Significant portions of the population in liberal democracies consider it possible that global elites drink the blood of children in order to stay young. Recent surveys suggest that around 17% of Americans believe in the QAnon myth. Some 5% of Germans believe ideas related to the anti-democratic Reichsbürger movement, which asserts that the German Reich continues to exist and rejects the legitimacy of the modern German state. Up to a third of Britons believe that powerful figures in Hollywood, government and the media are secretly engaged in child trafficking. Is humanity on the return journey from enlightenment to the dark ages? As segments of the public have headed towards extremes, so has our politics. In the US, dozens of congressional candidates, including the successfully elected Lauren Boebert, have been supportive of QAnon. The German far-right populist party Alternative für Deutschland is at an all-time high in terms of both its radicalism and its popularity, while Austria’s xenophobic Freedom party is topping the polls. The recent rise to power of far-right parties such as Fratelli d’Italia and the populist Sweden Democrats bolster this trend. I am often asked why the UK doesn’t have a successful far-right populist party. My answer is: because it doesn’t need to. Parts of the Conservative party now cater to audiences that would have voted for the BNP or Ukip in the past. A few years ago, the far-right Britain First claimed that 5,000 of its members had joined the Tory party. Not unlike the Republicans in the US, the Tories have increasingly departed from moderate conservative thinking and lean more and more towards radicalism. In 2020, Conservative MP Daniel Kawczynski was asked to apologise for attending the National Conservatism conference in Rome. The event is well known for attracting international far-right figures such as Italy’s Giorgia Meloni, Hungary’s Viktor Orbán, former Fox News host Tucker Carlson and the hard-right US presidential candidate Ron DeSantis. This year, an entire delegation of leading Conservatives attended the same conference in London. It might be hard for extreme-right parties to rise to power in Britain, but there is no shortage of routes for extremist ideas to reach Westminster. Language is a key indicator of radicalisation. The words of Conservative politicians speak for themselves: home secretary Suella Braverman referred to migrants arriving in the UK as an “invasion on our southern coast”, while MP Miriam Cates gave a nod to conspiracy theorists when she warned that “children’s souls” were being “destroyed” by cultural Marxism. Using far-right dog whistles such as “invasion” and “cultural Marxism” invites listeners to open a Pandora’s box of conspiracy myths. Research shows that believing in one makes you more susceptible to others. I sometimes wonder what a QAnon briefing to policymakers might look like in a few years. What if the room no longer laughs at the ludicrous myths but instead endorses them? One could certainly imagine this scenario in the US if Donald Trump were to win the next election. In 2019 – before conspiracy myths inspired attacks on the US Capitol, the German Reichstag, the New Zealand parliament and the Brazilian Congress – I warned in a Guardian opinion piece of the threat QAnon would soon pose to democracy. Are we now at a point where it is it too late to stop democracies being taken over by far-right ideologies and conspiracy thinking? If so, do we simply have to accept the “new normal”? There are various ways we can try to prevent and reverse the spread of extremist narratives. For some people who have turned to extremism over the past few years, too little has changed: anger over political inaction on economic inequality is now further fuelled by the exacerbating cost of living crisis. For others, too much has changed: they see themselves as rebels against a takeover by “woke” or “globalist” policies. What they have in common is a sense that the political class no longer takes their wellbeing seriously, and moves to improve social conditions and reduce inequality would go some way towards reducing such grievances. But beyond that, their fears and frustrations have clearly been instrumentalised by extremists, as well as by opportunistic politicians and profit-oriented social media firms. This means that it is essential to expose extremist manipulation tactics, call out politicians when they normalise conspiracy thinking and regulate algorithm design by the big technology companies that still amplify harmful content. If the private sector is part of the problem, it can also be part of the solution. Surveys by the Edelman Trust Barometer found that people in liberal democracies have largely lost trust in governments, media and even NGOs but, surprisingly, still trust their employers and workplaces. Companies can play an important role in the fight for democratic values. For example, the Business Council for Democracy tests and develops training courses that firms can offer to employees to help them identify and counter conspiracy myths and targeted disinformation. Young people should be helped to become good digital citizens with rights and responsibilities online, so that they can develop into critical consumers of information. National school curricula should include a new subject at the intersection of psychology and internet studies to help digital natives understand the forces that their parents have struggled to grasp: the psychological processes that drive digital group dynamics, online engagement and the rise of conspiracy thinking. Ultimately, the next generation will vote conspiracy theorists in or out of power. Only they can reverse our journey towards the digital middle ages. Julia Ebner is the author of Going Mainstream: How Extremists Are Taking Over (Ithaka Press). Further reading How Democracies Die by Daniel Ziblatt and Steven Levitsky (Penguin, £10.99) How Civil War Starts by Barbara F Walter (Penguin, £10.99) Pastels and Pedophiles: Inside the Mind of QAnon by Mia Bloom and Sophia Moskalenko (Redwood, £16.99)