There is no system that both allows communication between multiple parties and is infinitely resilient to a sufficiently determined, large, and well-funded group of people with guns.
What we can do with design and architecture is make each breach of communications security consume greater resources than unencrypted DNS, unencrypted HTTP, and unencrypted email.
There is no bit of land left on Earth where I could go live and not be governed by a determined, large, and well-funded group of people with guns. Perhaps it's time to start building with them in mind first?
Quite. That said, migrating to new protocols and systems is rather challenging. So we get retrofits like DNS over HTTP, and Oblivious DNS over HTTP.
Historically, radicalism in the form of whole-protocol-suite replacements has often seen little in the way of adoption. Whereas incrementalism in the form of tunnels and other protocol amendments has been much more successful.
There actually is unclaimed land left on Earth. I know there's a bit between Egypt and Sudan. Claiming the land would worsen their claim on a different, better, piece of land that they both claim is theres; so neither does.
Unsure of the status of non-government large, well funded groups of people with guns there is though.
What we can do with design and architecture is make each breach of communications security consume greater resources than unencrypted DNS, unencrypted HTTP, and unencrypted email.