Three weeks ago, I attacked Facebook CEO Mark Zuckerberg for his continuing refusal to fact-check ads from politicians, even in demonstrably false paid posts.

Thursday night, Sacha Baron Cohen (who I recently praised for his non-comedic acting in the Netflix series “The Spy”) gave a speech to the Anti-Defamation League in which he also took to task Facebook and other social media platforms as enablers for the spread of lies, misinformation, and hatred. An excerpt:

Today around the world, demagogues appeal to our worst instincts. Conspiracy theories once confined to the fringe are going mainstream. It’s as if the Age of Reason – the era of evidential argument – is ending, and now knowledge is delegitimized and scientific consensus is dismissed. Democracy, which depends on shared truths, is in retreat, and autocracy, which depends on shared lies, is on the march. Hate crimes are surging, as are murderous attacks on religious and ethnic minorities.

What do all these dangerous trends have in common? I’m just a comedian and an actor, not a scholar. But one thing is pretty clear to me. All this hate and violence is being facilitated by a handful of internet companies that amount to the greatest propaganda machine in history.

The greatest propaganda machine in history.

Think about it. Facebook, YouTube and Google, Twitter and others – they reach billions of people. The algorithms these platforms depend on deliberately amplify the type of content that keeps users engaged – stories that appeal to our baser instincts and that trigger outrage and fear. It’s why YouTube recommended videos by the conspiracist Alex Jones billions of times. It’s why fake news outperforms real news, because studies show that lies spread faster than truth. And it’s no surprise that the greatest propaganda machine in history has spread the oldest conspiracy theory in history – the lie that Jews are somehow dangerous. As one headline put it, “Just Think What Goebbels Could Have Done with Facebook.”

On the internet, everything can appear equally legitimate. Breitbart resembles the BBC. The fictitious Protocols of the Elders of Zion look as valid as an ADL report. And the rantings of a lunatic seem as credible as the findings of a Nobel prize winner. We have lost, it seems, a shared sense of the basic facts upon which democracy depends.

The Guardian has reprinted Sacha Baron Cohen’s speech in full. It is well worth your time.