Borders after the revolution

These places will still be there.  What do we do with them?  In a larger sense, what would a positive, world-scale approach to migration and  security/"community policing" look like?  How do we accommodate and reward migrants (not only from "foreign countries," an idea that will lose its political, divisive meaning) who offer socially necessary labor and cooperation, and guard against (and attempt to heal) actually dangerous people who remain alienated from the emerging society?  We are going to have to all be intimately aware of what work needs to be done and where.  We are going to have to be willing to help inspire people to find this work.  And,  established populations must develop a sense of trust and hospitality based on a common interest in making the experiment (or revolution) work.  No problem, right?!