Chapter 1 discusses Atticus' profession and the type of characters he has had to deal with in practicing criminal law. The description of the Haverfords he defended demonstrates a stark contrast morally and intellectually between Atticus and the people he serves.
Chapter 13 welcomes Aunt Alexandra, a proud Finch who relishes in their upper class reputation. She tries to get Atticus to discuss with Scout and Jem their gentle breeding, and he ultimately fails to get Alexandra's point across. That's because Atticus is a moral man who realizes doing the right thing is better than being in the right social class.
Chapters 22-23 gives the Finch family time to see the black community praise Atticus' efforts. Maudie also points out to the children that their father is the moral backbone of the county. He does the right thing when everyone else is scared to do so. Throughout the book he maintains a positive relationship with the town, but stands for justice in spite of others encouraging him not to for fear of what others may think. Sound familiar? It's not always popular to do the right thing.