trauma - A deeply distressing or disturbing experience, especially one with lasting emotional impact; a psychological or emotional wound, often resulting from an intense or life-threatening event.
Childhood trauma can have long-lasting effects on a person’s mental health
injustice - A situation in which the rights of a person or a group are ignored, and they are treated unfairly.
The American Colonies felt that 'taxation without representation' was an injustice that, among other things, warranted a revolutionary war of independence against England.