Why did engineers want to return to earth?

What instances in human history? Do you mean JC? He didn't bring an technological advances. I'm talking about the [i]Chariot of the Gods[/i] "theory" - which btw I think is crap but Ridley (who's not as nearly as smart as he thinks) introduced this idea. Basically the idea is that ETs came to earth and helped dumb humans how to construct pyramids, etc, etc. Then if something like that were going to happen in the movie - ETs sending someone to speed up the development of our space technology - then Weyland, according to info on Weyland websites, would be a perfect candidate. However, the movie doesn't mention his resume and all we know is he's a rich dude who financed this mission (apperently). Gods, divine intervention, creation of life, etc have very little to do with this movie - the main theme is the creation of reality.

NOo JC reference from me. I was thinking of the sciences and leaps forward in various disciplines. Creation of reality is a great overall theme but who's reality? And who or what is doing the creation? Since we are human I guess it is about the human creation of our reality. That darn 'Wormhole set of DVD's has me thinking of many realities that are possible. Our threasd here is why the Engineers want to return to earth. Because they were directed to by others. And the others want humans to be wiped out because they are somehow a threat. A new 'human' race would be created.... as has been done many times in our cosmic past and manytimes in the universal futire. The current human race is just an example of 'humans' but only one in hundreds or even thousands of examples. I guess as much as hate to admit it,,we are not special in the grans scheme of things, Unique but not special. Now I am depressed.