Both philosophically and technically, federation is the middle ground between "the centre should have total authority and control over the edges" (authoritarianism), and "there should be no centre, only edges" (individualism or egoism). The essence of federation is that its useful to have centres, but power ought to reside mostly at the edges.

@Hyolobrika There have been a huge number of attempts to build social media apps on blockchains. None of them seem to have had much success as yet. Here's a watchlist (may be a bit out-of-date and probably incomplete):

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