You assume they can get to 'monopoly'(how do you define monopoly? 80% 90% 100%?). In an actual free market that will rarely, if ever happens. When has that actu

You assume they can get to 'monopoly'(how do you define monopoly? 80% 90% 100%?). In an actual free market that will rarely, if ever happens. When has that actually occurred? (government backed cartels don't count)