All My Sons explores the consequences of war and dishonesty through the Keller family. Chris feels guilty for surviving the war when his brother Larry did not and for becoming engaged to Larry's former fiancee Ann. He confronts his father Joe about knowingly selling defective engine parts during the war that resulted in pilot deaths. Joe is in denial about his role while Chris struggles with the reality that his father's actions destroyed the family's illusion of prosperity. The play examines the post-war crisis as veterans return home physically but remain emotionally scarred by their experiences and guilt over surviving when others did not.