I kept thinking of Bill Gates while reading this, and not just because both of them turned to philanthropy after building their empires. The only reason Bill Gates is not richer than Rockefeller is because of the anti-monopoly legislation that was invented to stop Rockefeller. Without the antitrust lawsuit Microsoft would have been able to kill off Apple and Netscape in the 90s and kept the web bottled up within Internet Explorer in the 00s.