What is Self-Sovereign Identity?

I’ve written about self-sovereign identity, a scheme in which you control your own identity. But I haven’t really gone into depth on it. Ron Kreutzer and the team at Pillar are working on it. Here is Christopher Allen explaining the basics:

And here is the incomparable Drummond Reed, who has spent his career studying and promoting digital identity, explaining the DID standard, which I believe is the future standard for identity: