Comment Re:Everything would suddenly have an alien connect (Score 1) 333
You hit the nail on the head. The first thing any leader will do is try to get the aliens onto their side, be it by duplicity, cunning or whatnot.
I wouldn't be surprised if there were something like the Prime Directive out there, just because the lesson of an advanced civilization bumping into a lesser one usually means the lesser one is immediately eradicated. Our history shows this to be evident over and over again. (Aztecs, anyone?)
I would suspect any advanced power that can visit the earth undetected likely has its own agents and such so they have an in-deep knowledge of the world and its goings on at least on the level of the CIA's World Factbook, if not more.
So, when would the aliens step in? I would say only after an XK-level event where 90-99% of the population is gone and the form of governments we have now are destroyed. Maybe they wouldn't even get near us, unless we got to the point where the human race would be at the point of too few people to effectively sustain the race with DNA mixing. Something far greater than the Black Plague which changed the West from a dukedom-fighting-duchy backwater where a peasant was almost certainly dead before age 20 to one of the top dogs (mainly because kings just didn't have the physical backs to break to keep them in power, coupled with the fact that farms could grow other than basic food items to keep people fed.) A CK-level event where power fundamentally shifts, would just get aliens betting on what nation/religion will win the year's pissing contests at best. (Think Command & Conquer Generals, but with ISIS+AQ replacing the GLA faction, and Russia part of China's team.)