just dave
vintage rules!
Our excesses finally caught up with "us" and they really had no choice. Their civilization had gone right in the crapper due to the earth wearing out (remember the part about how they had trouble breathing our air because it has too much oxy?) and they came back to take control and change the future to ensure mankind's survival. Their New! Improved? version of it anyway.
Of course, their civilization had instituted what we feel were fairly draconian measures to stretch what was left and survive, and they brought that baggage with them. Doesn't help that we outnumber them about a million to one either, so figure a lot tighter controls are required to make their plan work. It was either that or just plug us all into the Matrix as organic "D" cells. I suspect there's some big warm 'n fuzzy compromise somewhere towards the end of the season. Either that or a thousand Olivias vaporize them and the Earth suddenly goes empty around the early 27th century ... stay tuned. <G>
One thing that puzzles me ... You never see any Observer women ... you'd think they'd be a lot happier? "Oh, yeah ... you're home late from work because you had some probing to do. Probably that blonde strumpet again, and I'm supposed to believe you were just probing her mind. Right. Go probe yourself, and make your own supper while you're at it."
To me it seems they're just here to conquer not help.