Some combination of

https://conspiracies.win/p/11RNy8tZCy/conspiracy-of-conspiracies/

and

https://conspiracies.win/p/11RO7SpyUw/theory-why-they-keep-aliens-them/

Wide spread assumption is that elites made some deal with aliens around 1970 and elites trying to fulfill their part of deal taking over planet and population.

What if things are completely opposite?

Shortly - more advanced aliens find out that humans are not developed enough for full-scale contact. However, elites have some knowledge of and may be contacts with aliens. Aliens told that it looks like Earth will be ready for contact in 21 century. IDK, some invention or some parameter of society development, or both, based on trends that was observed in science and society.

During that conversation with aliens elites made a good face, but after aliens departure they come to obvious conclusion, that joining of Earth into interstellar community will mean loss of higher power status for elites, as I wrote earlier. As soon as existence of any more developed aliens will be revealed it will immidiately mean that Earth elites are not highest power for humans and humans could flee from the elites control, and since space is endless, even if Earth elites somehow eventually reach you, you always could flee slightly further from them. But with high probability it would be just their complete and final fall.

So, they decided to stop scientific progress and do not allow social trends to develop freely to avoid passing alien's thresholds.

Take a look at diagrams at https://wtfhappenedin1971.com/ f.e. If pre-1970 trends would have been untouched, today we would live in completely different and significantly better world.

Same with science, continuing pre-1970 trend of growing number of fundamental inventions, that flying cars people dreamed about in 60s could have become already obsolete tech today.

Elites do not try to close the deal with aliens. They try to avoid creating conditions that could make that deal possible.

Presumably, elites know the date of next check meeting with aliens and trying to supress anything that could allow that deal.

That is why elites actions looks so illogical. They don't try to do something, they try to destroy as much as possible by any means.

Again, if elites had a deal with aliens to enslave humanity, their masters certainly would have provided some kind of textbook and assistance and highly probably nobody even noticed what is really happening, and their actions would not look chaotic and insane.

But if they just tryin to destroy all things aliens account as civilisation development, it would look exactly as it looks - imbecile trying to play wack-a-mole with population, destroying one thing or another, without any logic and plan.

And all that just to keep their status of highest power over humans and keep us under their total control.