"It's time we pause for breath before everyone charges off in a stampede of condemnation of tax-dodging-fake-news-extremism-promoting-data-controlling tech firms", he wrote.
He will move to California with his family in the new year.
But now Nick Clegg, the former deputy prime minister, has landed on his feet in Silicon Valley.
He was ousted as deputy prime minister after the Conservatives won a majority in 2015 in an election that saw his Liberal Democrats suffer a significant loss of support.More news: Arsenal's Aaron Ramsey could still stay at the club - Arsene Wenger
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'I hope to use some of those skills in my new role'.
"But the key decisions will soon pass to Parliament, of which I am no longer a Member, and once I had chose to take up this unique new challenge at Facebook, I felt it was best to get going sooner rather than later".
He'll replace Elliot Schrage, who recently announced he would be leaving after a decade at the tech giant. "Having spoken at length to Mark and Sheryl over the last few months, I have been struck by their recognition that the company is on a journey which brings new responsibilities not only to the users of Facebook's apps but to society at large", Clegg said.
The appointment comes amid intense scrutiny of the company and the threat of government regulation following allegations of election meddling and the Cambridge Analytica data scandal.