Hi Karen,
I completely agree that at high levels this has been happening in one form or another for a very long time.. and this is certainly something we need to get off of humanities back in order to have a world that works, a very primary factor. Thank you for pointing this out and it needs to be explored further...
I think it's important to bring the story much closer to home as well and look at it even within our own lives... within 'we the people'.
None of us, no where have managed to create a utopia on earth. No matter what community starts up, who is involved, it always comes down to politics, agendas and non-perfection. Now of course there is love, but let's be honest here, it's not all love! No community, no where, it's never in written history existed this utopia on earth, this abundant earth we've heard so much about.
Yes, manipulative aliens are a part of that surely. However, the story is much closer to home when we see that it is our own darkside that will erupt and cause problems with any community that starts up. Sure we might blame another, but it takes two to tango.
As long as we hold on to our own darkness, we will not have the abundant world that we know we are meant to have... so a key part of the path is to surrender our own darkness.. which I suggest is personified in the ego.
Once that's done, then we're really ready to shine our light on this world, get rid of all the baddies and help others achieve the true freedom they deserve! Freedom from the monkey on their back both in society, represented by the power elite, and freedom in their own lives, represented by freedom from the false self, the dark self that is the human ego (my take!). Not to be mean to the ego, just to send it love and observation is all

to transmute it and be reborn into the higher consciousness.
P.S. Important to consider: Behind the darkest aliens, are dark fallen beings that control them. It is worth considering that the top dark lords are not in bodies, but are basically consciousness itself. For example, imagine a personification of the consciousness of Greed, or another one of hate, or another one of jealousy, or another one of pride, or another one of false mental spirituality etc..
Consider that these larger beings which are personifications of negative consciousness itself are what controls these dark aliens and infects governments and society at large. But consider it is literally the SAME consciousness and beings that creeps in and infects our own little lives and attempts to destroy the good in even the little things. My point here is, the dark aliens are very much controlled by various consciousness of anti-christ, but consider that until we have surrendered our own darkness, that the same consciousness that controls the aliens to work against our evolution, works in US.
So even getting rid of the overlords is only a part of the solution, shining the light on our own darkness and surrendering it is the ultimate key and that is how the collective consciousness will shift and the abundant life will be manifest for all life! Yay.