Facebook acknowledged on Monday that the explosion of social media poses a potential threat to democracy, pledging to tackle the problem head-on and turn its powerful platform into a force for "good."
The comments from the world's biggest social network were its latest response to intense criticism for failing to stop the spread of misinformation among its two billion users - most strikingly leading up to the 2016 US election.
In a blog post, Facebook civic engagement chief Samidh Chakrabarti said he was "not blind to the damage that the internet can do to even a well-functioning democracy."
"In 2016, we at Facebook were far too slow to recognise how bad actors were abusing our platform," he said. "We're working diligently to neutralise these risks now."
The post - one in a series dubbed "hard questions" - was part of a high-profile push by Facebook to reboot its image, including with the announcement last week that it would let users "rank" the trustworthiness of news sources to help stem the flow of false news.
"We're as determined as ever to fight the negative influences and ensure that our platform is unquestionably a source for democratic good," said Katie Harbath, Facebook's head of global politics and government outreach, in an accompanying statement.
Facebook, along with Google and Twitter, faces global scrutiny for facilitating the spread of bogus news - some of it directed by Russia - ahead of the US election, the Brexit vote and other electoral battles.
The social network has concluded that Russian actors created 80,000 posts that reached around 126 million people in the United States over a two-year period.
"It's abhorrent to us that a nation-state used our platform to wage a cyberwar intended to divide society," Chakrabarti said.
"This was a new kind of threat that we couldn't easily predict, but we should have done better. Now we're making up for lost time," he said.
Chakrabarti pointed at Facebook's pledge last year to identify the backers of political advertisements - while also stressing the need to tread carefully, citing the example of rights activists who could be endangered if they are publicly identified on social media.
He also elaborated on the decision to let Facebook's users rank the "trustworthiness" of news sources, saying: "We don't want to be the arbiters of truth, nor do we imagine this is a role the world would want for us."
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