The monopolies I can think of, at&t,, were they created because of government intervention?
The definition of "monopoly" that Classical economists used is a bit different to the one we use. A "monopoly" was a firm with which no-one could legally compete. A common form of monopoly would be when the government makes itself the sole provider of a good (like the post office supplying first-class mail). I'm not aware of US firms, but certainly a government can exclude competitors from entering the market through regulations that will make it difficult for small firms to compete.
I hear telecommunications is strictly regulated by the US FCC.
Irish Liberty Forum
Short answer: yes.
Slightly longer answer wrt your AT&T example: AT&T was made a monopoly by government fiat during WW1.
Knight_of_BAAWA: Short answer: yes. Slightly longer answer wrt your AT&T example: AT&T was made a monopoly by government fiat during WW1.
Thank you....are there articles that go in detail on the ATT and WWI?