A former engineering director at Meta Platforms testified on Wednesday that CEO Mark Zuckerberg was responsible for a culture that may have led the ‌company to shirk its responsibility to protect children who use its Facebook and Instagram platforms from harm.

Arturo Bejar, a vocal Meta critic who worked at the company from 2009 to 2015 and as an independent contractor from 2019 to 2021, said Zuckerberg was closely involved in much decision-making, and the company's top-down culture ensured that product design changes would occur only if he ordered them.

"If Mark makes something a priority, mountains move in months," Bejar said.

Bejar is the first witness in a landmark trial over claims brought by a coalition of states accusing the company ⁠of designing its platforms to addict young users and........

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