Well, something like this hasn't happened, but here's a theory I'm kind of making up as I go.
As much as I want to say there would be some huge revolution and that no one would stand for a transition like this, i know there wouldn't be. 1984 pretty much hits the nail on the head in this case where the majority of society would follow what the new government said because the government would make them empty promises, provide basic necessities for them, and rally them together against a common enemy. This would be the middle of the spectrum of the public, and at either end would be a minority; one end being the ruling elite, and the other being the rebels trying to overthrow them.
The concept in Brave New World is something different from this in that it is not a world where people's freedoms are necessarily taken, but they are conditioned, even bred, to do their jobs. Due to this, an Alpha wants only to do his job as an Alpha, and an Epsilon is perfectly happy with his job as an Epsilon. There is no will to move up or do better, only to do what one is programmed to do.
These are two completely different methods of controlling people, but both prove to be effective. The majority of people are quite content with their limited freedoms, but at either end you have those who want more than the normal freedoms. These are classified as three different types of people. You've got the sheep (those who follow), the wolves (the ruling elite who benefit from the majority or the sheep), and the sheepdogs (those who see the rulers unfit and want to free the sheep and protect them).
As far as more ideas, I highly suggest the movie Equilibrium or the book 1984. As for the psychology of how people will react when their freedoms are taken, I suggest the books "On Killing" and "On Combat."
Hope this helps a bit.
