"I suggest you do your homework before you start slinging mud. Go read some Abraham Maslow. 'Immigration' is neither the result nor the cause of overpopulation. Historically, 'immigration' HAS meant the fall of empires. See Rome..."

               Well Sorcha, at least your not so blind as to suggest, as some posters do, that overpopulation doesn't exist.

               And, of course, once an area begins to reach its saturation point, it would make sense that immigrants would quit going there. That wouldn't, however, preclude the immigrants who went there earlier from procreating, and that's where the overpopulation would most likely come from.

                And Rome was never a democracy, so it wasn't vulnerable to immigration in the same way that modern countries are. But it's not too hard to figure out how runaway immigration could result in many modern democracies falling to third world status. If that's what you want, support unchecked immigration.