I think the only answer is technology. A communication network that can't be controlled governments and which is anonymous by default (unless you communicate something which deanonymises you like "My name is x").

I don't believe that a practical technology exists that would allow such a network to materialise. When I look at the technological advances that have happened in the last hundred years though, I can't help but believe that such technology will be developed during my life time. And if not, soon after.