I remember seeing something on 20/20 or something like that about a University Professor who wrote a book about how the Globalists desire a melting away of countries sovereignty and a tactic to do this is uncontrolled immigration. This immigration would eventually be so great as to overtake the host country thus rendering a former shell of itself.

Something about, new citizens have no history or patriotic tendencies etc.... and eventually the host country becomes controllable by the globalists..

Ring any bells?