@evan I think you have to start with instances, but I don't think you call them that. An instance is a technical term that is completely meaningless to almost everyone. Call it a Community. That's the core of the hierarchy.A Community decides to host a Social PlatformThat Community selects the types of content they want to share and then runs the appropriate software (Mastodon, PeerTube, PixelFed, Friendica, etc)That Community enables its members to join via the software they've set upThat Community can then communicate with other Communities via the protocols available (ActivityPub)The software is really secondary here. A community could run multiple pieces of software for their own purposes. In fact they probably should. The CBC Community should run both Mastodon and PeerTube.It's not "one instance", It's a community running instances of all of the software they need.I know you have an option for "people", but I don't think that is specific enough. It's "Communities of People".