Elon Musk’s biographer said the billionaire sometimes goes into “demon mode” in order to be highly productive—but that it can make him "dark" and act "with a real lack of empathy."
Bestselling author Walter Isaacson, who observed Musk's day-to-day life for about two years, was discussing the tech tycoon on a Twitter Spaces interview ahead of the release of his biography on the Twitter, Tesla and SpaceX owner.
