Twitter's former CEO called Mark Zuckerberg a 'ruthless execution machine,' but many Silicon Valley insiders don't agree
Business Insider -

Facebook CEO Mark Zuckerberg is at the center of a debate about the role of social media in a democracy.

Silicon Valley executives shared their opinions of Zuckerberg in an article in The New Yorker on Wednesday.

Former Twitter CEO Dick Costolo called Zuckerberg a "ruthless execution machine," but other executives described him more sympathetically. 

As Facebook finds itself at the center of a global debate about free speech, fake news, and the role of social media in a democracy, much of the...


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