Atticus Finch, the father of Scout and Jem, is a peace-maker in the novel To Kill a Mockingbird. Although he recognizes the world, and especially Maycomb, to be a hard and problematic place, Atticus tries to make his world a place where peace can be found.
There are a few specific instances where one can see examples where Atticus tries to make peace with those around him and his children.
First, Atticus (knowing that his defending of Tom will cause problems) tries to change the minds of those around him regarding people of color. Not only does Atticus try to explain to his children the importance of acceptance, he tries very hard to change the minds of the prejudiced in Maycomb.
Second, Atticus knows about the rumors which run rampant in Maycomb about Boo. He tells his children to stop harassing Boo and his home in order to keep peace between the two families.
Lastly, Atticus knows the problems a rabid dog will bring the the families on the street. IN order to keep peace for the community, Atticus decides to kill the dog.
He is so much more humane and fair minded than most of the other people in Maycomb. In a society that was full of racism and arrogance based on who their ancestors were, Atticus lacks either of those bad characteristics.Contrast him with Aunt Alexandra, for example. She is so snobby -- she thinks she's better than everyone because of her family name. Atticus doesn't feel that way.