As we enter the new century, we can see yet another change. Kids do not have multiple memberships so much as multiple selves. They are many people bundled into one. And now we can't tell very much about them from the way they dress. Now  they belong to networks [...], and this is the new locus of the self. These kids are distributed across social worlds and cultural worlds. The days of a definining social group are gone. The days of fixed membership are gone. Indeed, the very idea of a generation may well be over. (emphasis mine)