When a new system is on the rise, it needs more people to join. Maybe it doesn’t need everyone, there may be an “out” group which is either the enemy or the scapegrace or both, but basically they want people inside their new system. Capitalists want wage workers; communists want everything collectivized and so on.
But when you’ve won, when your system, your ideology, is the only one available to most people, well then, you want people out because if you push them out the benefits for those who remain are greater and because being pushed out is such a huge punishment. If there is more than one system easily accessible to people, a person kicked out of one can usually go to another.


