The less infrastructure investments and diversity of connections that a country has to the Internet, the more control they can exert over the country’s overall connectivity.
Most countries have gradually moved towards increased diversity in their Internet infrastructure over the last decade, especially as it concerns international connectivity to the global Internet. However, some countries remain at severe risk of Internet disconnection, with only one or two providers at their “international frontier”. This minimal diversity is often maintained for political purposes, making it easier to disable international Internet connectivity if deemed necessary
via Breaking the Internet: Swapping Backhoes for BGP | Dyn Blog