In that they are willing to screw over other civilizations in order to acquire resources for themselves. In an interview with the AFP, Stephen Hawking likens aliens landing on Earth to "when Columbus landed in America, which didn't turn out too well for the Native Americans."Now, no offense to Dr. Hawking, but it's quite an assumption to think that any race of aliens is likely to want to clear us out for all of our top notch air, water, and other natural resources. Isn't it just as likely that any race landing on Earth would look down on us as being a bunch of self-serving pricks? This weekend I Netflixed District 9, and somehow the movie's vision of stranded aliens being forced to live separately in run-down slums just doesn't seem too off-the-wall given our track record as a species. As is generally the case, my viewpoint on the matter has been shaped by George Carlin, who sums up the awkward relationship we'd have with advance alien life in the clip below (starting at the 3:05 mark, but if you're at all like me you'll want to just watch the whole video).