What are the motifs in American Pastoral by Philip Roth?

Damage in the name of goodness is a recurring idea. Merry Levov, out of compassion for the Vietnamese who are being killed needlessly, turns on her own country and kills four people in the process. She feels she is right and good, but she turns out to be a "monster" in the sense that she has ruthlessly, brutally killed four Americans. Dawn Levov, who is the perfect, humble Irish girl, in trying to reconstruct her life, causes her husband untold pain