Why did the works of Nathaniel Hawthorne focus mainly on moral struggle?

Nathaniel Hawthorne's works often focused on moral struggles because he was interested in exploring the complexities of human nature and the tension between good and evil. Through his stories, he delved into themes of guilt, sin, and redemption, highlighting the moral dilemmas that his characters faced. By examining these struggles, Hawthorne offered insight into the moral fabric of society and the consequences of one's actions.