Frances Haugen’s interview with the US news programme 60 Minutes contained a litany of damning statements about Facebook. Haugen, a former Facebook employee who had joined the company to help it combat misinformation, told the CBS show the tech firm prioritised profit over safety and was “tearing our societies apart”.

Haugen will testify in Washington on Tuesday, as political pressure builds on Facebook. Here are some of the key excerpts from Haugen’s interview.

Choosing profit over the public good

Haugen’s most cutting words echoed what is becoming a regular refrain from politicians on both sides of the Atlantic: that Facebook puts profit above the wellbeing of its users and the public.

“The thing I saw at Facebook over and over again was there were conflicts of interest between what was good for the public and what was good for Facebook. And Facebook, over and over again, chose to optimise for its own interests, like making more money.”

She also accused Facebook of endangering public safety by reversing changes to its algorithm once the 2020 presidential election was over, allowing misinformation to spread on the platform again. “And as soon as the election was over, they turned them [the safety systems] back off or they changed the settings back to what they were before, to prioritise growth over safety. And that really feels like a betrayal of democracy to me.”

Facebook’s approach to safety compared with others

In a 15-year career as a tech professional, Haugen, 37, has worked for companies including Google and Pinterest but she said Facebook had the worst approach to restricting harmful content. She said: “I’ve seen a bunch of social networks and it was substantially worse at Facebook than anything I’d seen before.” Referring to Mark Zuckerberg, Facebook’s founder and chief executive, she said: “I have a lot of empathy for Mark. And Mark has never set out to make a hateful platform. But he has allowed choices to be made where the side-effects of those choices are that hateful, polarising content gets more distribution and more reach.”

Instagram and mental health

The document leak that had the greatest impact was a series of research slides that showed Facebook’s Instagram app was damaging the mental health and wellbeing of some teenage users, with 30% of teenage girls feeling that it made dissatisfaction with their body worse.

She said: “And what’s super tragic is Facebook’s own research says, as these young women begin to consume this eating disorder content, they get more and more depressed. And it actually makes them use the app more. And so, they end up in this feedback cycle where they hate their bodies more and more. Facebook’s own research says it is not just that Instagram is dangerous for teenagers, that it harms teenagers, it’s that it is distinctly worse than other forms of social media.”

Facebook has described the Wall Street Journal’s reporting on the slides as a “mischaracterisation” of its research.

Why Haugen leaked the documents

Haugen said “person after person” had attempted to tackle Facebook’s problems but had been ground down. “Imagine you know what’s going on inside of Facebook and you know no one on the outside knows. I knew what my future looked like if I continued to stay inside of Facebook, which is person after person after person has tackled this inside of Facebook and ground themselves to the ground.”

Having joined the company in 2019, Haugen said she decided to act this year and started copying tens of thousands of documents from Facebook’s internal system, which she believed show that Facebook is not, despite public comments to the contrary, making significant progress in combating online hate and misinformation . “At some point in 2021, I realised, ‘OK, I’m gonna have to do this in a systemic way, and I have to get out enough that no one can question that this is real.’”

Facebook and violence

Haugen said the company had contributed to ethnic violence, a reference to Burma. In 2018, following the massacre of Rohingya Muslims by the military, Facebook admitted that its platform had been used to “foment division and incite offline violence” relating to the country. Speaking on 60 Minutes, Haugen said: “When we live in an information environment that is full of angry, hateful, polarising content it erodes our civic trust, it erodes our faith in each other, it erodes our ability to want to care for each other. The version of Facebook that exists today is tearing our societies apart and causing ethnic violence around the world.”

Facebook and the Washington riot

The 6 January riot, when crowds of rightwing protesters stormed the Capitol, came after Facebook disbanded the Civic Integrity team of which Haugen was a member. The team, which focused on issues linked to elections around the world, was dispersed to other Facebook units following the US presidential election. “They told us: ‘We’re dissolving Civic Integrity.’ Like, they basically said: ‘Oh good, we made it through the election. There wasn’t riots. We can get rid of Civic Integrity now.’ Fast-forward a couple months, we got the insurrection. And when they got rid of Civic Integrity, it was the moment where I was like, ‘I don’t trust that they’re willing to actually invest what needs to be invested to keep Facebook from being dangerous.’”

The 2018 algorithm change

Facebook changed the algorithm on its news feed – Facebook’s central feature, which supplies users with a customised feed of content such as friends’ photos and news stories – to prioritise content that increased user engagement. Haugen said this made divisive content more prominent.

“One of the consequences of how Facebook is picking out that content today is it is optimising for content that gets engagement, or reaction. But its own research is showing that content that is hateful, that is divisive, that is polarising – it’s easier to inspire people to anger than it is to other emotions.” She added: “Facebook has realised that if they change the algorithm to be safer, people will spend less time on the site, they’ll click on less ads, they’ll make less money.”

Haugen said European political parties contacted Facebook to say that the news feed change was forcing them to take more extreme political positions in order to win users’ attention. Describing polititicians’ concerns, she said: “You are forcing us to take positions that we don’t like, that we know are bad for society. We know if we don’t take those positions, we won’t win in the marketplace of social media.”

In a statement to 60 Minutes, Facebook said: “Every day our teams have to balance protecting the right of billions of people to express themselves openly with the need to keep our platform a safe and positive place. We continue to make significant improvements to tackle the spread of misinformation and harmful content. To suggest we encourage bad content and do nothing is just not true. If any research had identified an exact solution to these complex challenges, the tech industry, governments, and society would have solved them a long time ago.”