What if We Discover Them VS. What if They Discover Us?
If we discover ET microbes, it will not really upset the apple cart that much. Why? Because technically, it was already announced, and it
didn't...even though later the findings were laced with much doubt. We've all but proven water flowed (and may still in some areas) on Mars, yet it
hardly made a ripple in public opinion.
Chances are, if any other intelligent beings (and by intelligent, I mean sentient, i.e. they are self-aware, can communicate with us, etc.) are
capable of visiting us, then they likely already have. The bigger question is "if they are visiting, why are they keeping secret"? That's the real
kicker. Conquest doesn't seem to be the key, or we'd likely already be enslaved or served up on a dinner platter by now. My theory is "containment
and observation", but it's only that....a theory.
If we discovered other intelligent beings (we found them), then the result would depend on who was more advanced. If they were less, we'd likely
exploit them quite a bit before society as a whole reigned in those doing so. If more advanced, we would try to find a bargaining chip, and seek out
an exchange for technology.
How Would We Deal with Valuable Resources? Trading? Stealing?
See above, all depends on who is perceived to have the power.
What if We Were To Discover Technology? Civilizations?
We'd still look for others (and with even more zeal). We'd exploit what we found, no doubt, and look for both live civilizations, and dead ones. For
me, I'd actually PREFER this result, as it would support that we aren't alone, while not having the threat of "evil" aliens out to get us.
If we were to meet aliens more intelligent than us, and they were out to get us, I'd imagine it would be similar to V....(they'd use our own
cultural expectations, and conventions, etc. to undo us).