Engrams are basically imprints on your mind from traumatic events that are repeated when something reminds you of it. It is triggered even more strongly when you are in a similar situation, and these aberrations also tend to be acted out by those who suffer from them. The Reactive mind considers the abuser in the situation to be the one more likely to survive, so when these engrams are re-enacted by the people suffering from them, it is almost always as the abuser. This is passed on generationally and the engrams can cause people to become abusers themselves.
This psychological process can also be acted out in entire groups. They say that when a group of people who are oppressed rise up, they can be worse than the oppressor. If a revolution happens, the ruling elites can experience a great fear from the masses they once oppressed. When so many people are caused engrams by a system or by oppression in society and finally get a chance to act out some kind of revenge or violence, the engram will go into overdrive and cause them to finally rise up and fight. However in normal circumstances, people like this choose to succumb to engrams or simply bear them because they know the systems in society will never allow them to win. This however only reinforces the engram and causes it to be acted out more severely when the time comes. We can even apply this to abusive relationships or revenge as well.
Generations of abuse or mistreatment of children are obvious cases of engrams being acted out by the person who suffered them, or even justifying them by claiming they are the correct way of treating family. Justifying engrams being inflicted on us is done to remove blame psychologically from the abuser, because we are dependent on them. This usually happens with parents, governments, or organizations that engage in subtle abuses of their people in some way. Modern people in poverty suffer from engrams because of it, but they see themselves as dependent on the society that inflicted that onto them. Instead of developing the resentment towards the society they logically should have, they assume this is a normal state of being because they believe they are either helpless or unable to resist on a subconscious level. They succumb to engrams because they don’t want to fight. They act it out by defending the systems that caused them engrams, and they avoid dealing with it by upholding an assumption that the engrams inflicted onto them were just.