To kill a mockingbird - How is the theme of prejudice and discrimination presented in the book?

To Kill a Mockingbird is a novel revolved mainly around the events before, during, and after the trial of a black man, Tom Robinson, who was accused of raping Mayella Ewell, a white. As the summary in the book stated, "they (the children) begin to learn that life is not as straight-forward and as fair as it seemed through the eyes of their childhood...and how people react when they are forced to choose between their prejudices and what they know is right."
Set in the Southern state of Alabama, just decades after the civil war and during the Great Depression, prejudice and discrimination a…