It's very clear that James Cameron believes that enemies might not respect you enough to let you live, they'll at least respect you enough to kill you to your f

It's very clear that James Cameron believes that enemies might not respect you enough to let you live, they'll at least respect you enough to kill you to your face instead of just ignoring you and waiting for you to starve to death. Ridley Scott seems to be more on the fence. Someone once pointed out that for physics reasons an alien civilization might 'invade' us by simply stealing our entire Oort Cloud while we watch helplessly from the ends of telescopes, and then leave us stranded, unable to throw rocks and ships high enough and far enough to get revenge, because we need the Oort cloud to build a proper galactic civilization to fight back.