I remember once in history class, we were taught about the whole stigma that during the United States early years, European Americans would take Native American lands and put them in preserves. I then joked on the idea if an alien species for whatever reason, would just come to earth and relocate humanity as a form of historical Karma. Well turns out I wasn't the only person who would think of this idea, and that's exactly what happened within the plot of the movie Home
In the Movie, for a ridiculous reason, an alien species known as the boov decide to relocate ALL of humanity to preserves located in Australia in a place known as humanstown. there each family would be given basic ownership of houses grouped up in circular batches.(Probably to make sure different cultures would not be too off to one another). And all the humans were given an adequate supply of basic needs and entertainment. In this "Town" The people don't have to work on any jobs, need to be paid, worry about civil protection, or have to farm their own food, It's all done by the aliens. Information like news and what's going on behind other batches more likely would not be shared publicly. All humans within the preserve are told that they will be living in these preserves for forever, and that moving to different other preserves is either physically impossible or illegal. Meanwhile the rest of the boov take all of human housing and property and live in it themselves.
As to ensure enforcement, the boov would more likely do everything they can to distract humanity from thinking about there past home, and consider acts of disrespect or hostility as "mistakes". and if seven mistakes are made to a specific human. They could simply erase them, or "poof" them off of existence. If this rule of enforcement was done to themselves, it's more likely they would do the same to other species.
by the end of the movie, most of the the aliens decided to leave the earth and live on the moon instead, and relocate humanity again back to their initial homes.
So the question is, how would different Nationalities, Religions and different groups of people REALLY react in such a situation if they were sent to these centers? and if they did bring all 7+ billion people back to their exact homes, would all the world's nations, businesses and jobs be able to function back into their pre-alien selves? If so, how long would it take? would the world really accept these aliens to their own societies? If not, would they care if they stayed on the moon and agreed not to interfere with them again? Or would they simply in fear reverse engineer there technology and eventually go to war with them?
A Few Handwaves
No biological or language barriers. They change themselves to fit earth and vaccinate all of humanity and its wildlife by gassing the atmosphere.
The World's military doesn't detect them on time to stop them or warn anyone about the invasion.
Somehow, they have enough supplies and labor to support ALL human needs and a few wants. The best way that this could possibly be justified is that aliens have been living on a moon sized interstellar ship for several years, so they more likely have the technology to easily create food in huge amounts to sustain the population, same can go for creating 'Human food'.
The Aliens catch ALL of humanity in about an hour. same amount of time it took for them to bring them back.
The Scenario doesn't really have to go like it is in the film. A situation like this would not even be close to being something realistically aliens would want to do to a primitive civilization. Even if they had a freakish desire to take Earth-land, they could've easily put them all in simulations, though it is interesting that they at least CARE about the life of humans unlike most fictional aliens in film.
But still, it's interesting to see how a situation like this could go down.