Even in US there is only one Google, Facebook, Microsoft, Apple, etc. It seems like these global monopolies are a new phenomenon that requires to rethink past economic ideas.
Yes, it is new because it is global, Rockefeller was a local phenomenon. Before you have monopolies per country and now these monopolies (or call them as you want) are centralized in US.
Even in US there is only one Google, Facebook, Microsoft, Apple, etc. It seems like these global monopolies are a new phenomenon that requires to rethink past economic ideas.