A Sociopath is someone who lacks what are sometimes called the higher emotions: love, compassion, or a sense of shame. They only have the basic lizard brain emotions such as fear and anger. They lack the ability to feel sorry for anyone else, or any sense of empathy whatsoever.
A Narcissist is someone who has the higher emotions but only as they apply to themselves. Like sociopaths, they lack the ability to care about anyone else.
Depending on which study you are looking at, between 1% and 10% of the population in the west is either a sociopath or a narcissist.
Studies also show more than half the people in prison for violent crimes are sociopaths.
While most sociopaths and narcissists can blend in well, there are easy ways of testing for it. For example, upon seeing someone grievously hurt there are certain psychological changes that can’t be faked. Those changes can be tested for. There is no reason a society could not have mandatory testing for all its people upon adulthood.
So knowing the above what if a society decided to treat them as second class citizens? Tattoo them, forbid them from running for office or anywhere that lives would depend on them.
There is no real data on what would happen to our society at large. From what little data we have a large percentage of CEO’s and politicians are either sociopaths or narcissists (sociopaths at least tend to gravatate to positions of power and money, such as being a surgeon). While we have no way of knowing for sure what would happen, I think the changes would be both profound and subtle.
Both groups are fond of the big lie. The idea that if a lie is big enough and absurd enough it will be believed. This often works because we assume everyone’s brain works like ours does. We assume people we are talking to or who are talking to us have compassion as we do.
Doing this would of course create an underclass. What I find interesting is how this would be an underclass that would have little to do with money or with hereditary. You would be putting people there because of who they are and not what they are.
The outcome of this could range on one extreme from being disabled. Little socal stigma, they would just be unable to do certain jobs. The other end of the spectrum they would be untouchables, shunned by all and trusted by none.