Mark Zuckerberg just published an article on Wall Street Journal.

Argues concentrated superintelligence would give a few institutions excessive economic and political control.

"Historically, hoping that an absolute power will benevolently provide for humanity if sufficiently enlightened hasn’t led to safe or positive outcomes.

As a thought experiment, imagine only one person had a superintelligent lawyer. He would have an unfair advantage in court—even if his position was wrong on the merits. That would lead to a worse society. "