Forget Building Walls, Technology Is Tearing Them Down

With all the talk of building walls, it seems to me that technology has actually been rapidly tearing down walls. Besides your passport, what really defines your nationality these days? Is it where you were live? Where you work? The language you speak? The currency you use? If it is, then despite an increase in "nationalism" (i.e., Brexit), we may see the idea of "nationality" quickly dissolve in the decades ahead... Or at least become...