That's why there is no single party to control communication, and even for money there is US vs EU systems. "Actually decentralized" has a lot of problems, esp

That's why there is no single party to control communication, and even for money there is US vs EU systems. "Actually decentralized" has a lot of problems, especially with things like spam and scams (see also: usenet). Federation makes sure no single party has too much power, and yet allows one to have usable systems.