How? He got fired from Paypal so he didn't revolutionize paying for stuff as much as he was trying to get in the way of it. How did he revolutionize phone books? He didn't do much for electric vehicles. Tesla has been doing well but to attribute that to him personally I is bizarre. And regarding space travel, sure he works on SpaceX and reusable rockets are a great idea but what did he personally contribute? The idea to use ipad-like touchscreens in an environment where physical controls will be better in an emergency? Or compromising the design of a rocket to make a reference to the movie "The Dictator"? It's becoming more and more apparent that Elon's companies have had successes in spite of him rather than because of him. It's even worse now since he's taken engineers away from his other companies and is making them work on Twitter instead.