Prejudice + Injustice
Prejudice:
forming judgement before knowing the facts
Injustice: lack of justice, wrong
Chapter 3 - "First of all," he said, "if you can learn a simple trick, Scout, you'll get along a lot better with all kinds of folks. You never really understand a person until you consider things from his point of view […] until you climb into his skin and walk around in it."