Nothing wrong with peace and good will, I know that sickens some folks, but why not give it a try, ya dig?
To observe us, learn about us, maybe even give us a helping hand, maybe they influenced us, or even effected our evolution. Scientists keep trying to find that missing link between us and olde hominids, it's possible genetic manipulation was done, we're just learning it now, imagine what a millon/billion year old civilization could do? I mean if Star Trek (lay off Deckard

) can have stories about people in space ships searching for and observing strange new life, and new civilizations, why could there not be a real thing out there by some advanced, civilized society? Hell, if I really wanted to use an episode in comparison, I could see us at that civilization in the TNG episode "First Contact" or "Who watches the watchers"
I'm hoping to be able to head to a few different states and Mexico to study some of the unusual structures for myself, maybe even crack some puzzle of code if lucky. I'd also love
to go to some of the crop circles.