I don't think I'd say "inevitable". Possible, maybe.

https://en.wikipedia.org/wiki/Splinternet

The splinternet (also referred to as cyber-balkanization or internet balkanization) is a characterization of the Internet as splintering and dividing due to various factors, such as technology, commerce, politics, nationalism, religion, and divergent national interests. "Powerful forces are threatening to balkanise it", wrote the Economist weekly in 2010, arguing it could soon splinter along geographic and commercial boundaries.[1] The Chinese government erected the "Great Firewall" for political reasons, and Russia has enacted the Sovereign Internet Law that allows it to partition itself from the rest of the Internet.[2][3] Other nations, such as the US and Australia, have discussed plans to create a similar firewall to block child pornography or weapon-making instructions.[1]

Clyde Wayne Crews, a researcher at the Cato Institute, first used the term in 2001 to describe his concept of "parallel Internets that would be run as distinct, private, and autonomous universes."[4] The concept itself dates back at least to pair of articles in the journal Science and at the International Conference on Information Systems by Marshall van Alstyne and Erik Brynjolfsson in 1996 and 1997.[5][6] They argued that it the Internet and related technologies "have the potential to fragment interaction and divide groups by leading people to spend more time on special interests and by screening out less preferred contact." They dubbed this effect "cyberbalkanization" and developed a set of formal measures.[7]

Crews used the term in a positive sense, but more recent writers, like Scott Malcomson, a fellow in New America's International Security program, use the term pejoratively to describe a growing threat to the internet's status as a globe-spanning network of networks.[8]