There are three truths about the role of justice. The first one is that God created us in his Divine Image. The second truth is that we are religious beings. The third truth is that humans are created to live in loving communion with each other.
Adam and Even didn't trust the Lord, and disobeyed him. The took the forbidden fruit from the serpent in the Garden of Eden. They didn't respect the truths about justice.
The effect of Adam and Eve's disobedience was that they lost their state of original holiness and justice. They lost it for themselves, but also for all human beings, except Mary and Jesus. This is known as Original Sin.