Wealth begets wealth. It compounds. The larger the market, the more space there is for a company to take the lead, put up barriers to entry, and focus on snuffing out any would-be competitors.
Not true. See [0] for a list of examples, which contains several cases of barriers to entry that do not involve governments in any way (except as the entity that allows contracts to be enforced and the market to exist in the first place).
Half of those examples need to be sustained by the government to actually act as barriers. And all of them ignore the creativity of the entrepreneurial mind when incentivized by the fabulous profits to be had in a monopolized market. A nice example:
