What the hell is this 'social memory complex'?

The Orion invaders and the Frontliners try to enslave the masses before this forms.

What's the relationship to the MSM narrative and a social memory complex?

Preceding agreements which future generations have no direct recall, but are formative of the possiblity of choices available like the US Constitution, but more psyche and metaphysical, perhaps.

Matrix-movie? At what point does being born in a system mean you have no choice, but to be part of it.