what is freedom?
a right protected by a state constitution is not freedom.
a declaration of the united nations is not freedom.
running off into the woods and hiding in a bunker by yourself is not freedom.
no individual can be free on their own, in fact. no exclusive part of humanity can be free, either.
by "none of us are free until all of us are free", it means that our solidarity across the globe is the very condition which makes all of our freedom possible.