The performance of identity
Nora plays the role of happy, childlike wife so consistently that even she has trouble separating the performance from the person. The play shows how social roles can replace genuine selfhood, and what it costs when someone finally stops performing.
Marriage as a power structure
The Helmer marriage looks loving on the surface, but Torvald controls the money, sets the rules, and decides what Nora is allowed to do. The play treats this not as unusual cruelty but as the normal operation of a 19th-century marriage, which is exactly what makes it disturbing.
The law versus moral reality
Nora broke the law, but she did it to save her husband's life. The play forces the audience to hold both facts at once. Legal guilt and moral innocence sit in the same act. The legal system, built by men, doesn't account for the position Nora was in.
Self-knowledge and awakening
Nora spends most of the play managing other people's perceptions of her. Her final conversation with Torvald is the first time she thinks out loud about who she actually is. The play treats that moment of self-examination as more important than any of the plot's external crises.
Financial dependence as control
Money runs through every relationship in the play. Torvald controls Nora through her allowance. Krogstad controls Nora through her debt. Mrs. Linde married a man she didn't love for financial survival. The play shows that economic dependence is not a side issue; it shapes what choices are even possible.