Zuckerberg was speaking to lawmakers during his inaugural appearance at a hearing, sparked by the Cambridge Analytica scandal, in which the British research firm hired by the Trump campaign improperly obtained data from 87 million Facebook users.
The Facebook chief, who tried to strike a conciliatory tone on Tuesday, said the buck did ultimately stop with him. He has accepted responsibility for all of the regulatory shortcomings on the social media platform.
He assures lawmakers that steps are being taken to protect consumer data.
“It’s clear now that we didn’t do enough to prevent these tools from being used for harm,” said Zuckerberg.
“That goes for fake news, foreign interference in elections, and hate speech, as well as developers and data privacy. We didn’t take a broad enough view of our responsibility, and that was a big mistake,” added Zuckerberg.
“It was my mistake, and I’m sorry. I started Facebook, I run it, and I’m responsible for what happens here.”