Answer:
In Chapter 10, Scout is confused as she cannot understand why her father keeps his shooting skills a secret and never shoots anymore.
When having a conversation about it with Miss Maudie, she is told that Atticus does not think that his shooting talent should be a matter for pride, as he does not want to stand out from the rest of the people. That is why he never shoots, unless he really has to. Jem later comments that their father 'is acting gentlemanly' as he avoids killing. In their own way, Jem and Scout come to a conclusion that Atticus is a modest and humble man. They also learn that, regardless of one's talents and skills, one should always have both feet on the ground.
I think the answer is “Working together, America has done well”
