Here's a breakdown:
* Nora's sense of self: She has lived a life of pretense, playing the role of a happy, submissive wife and mother. She has been financially dependent on her husband, Torvald, and has made decisions based on what she believed would please him.
* The conflict with her husband: Torvald sees Nora as a frivolous, childlike creature who needs his protection and guidance. He doesn't recognize her as an independent individual with her own thoughts and feelings.
* The revelation of her secret: When Nora's past comes to light (she forged her father's signature to get a loan to save Torvald's life), her carefully constructed world crumbles. This realization forces her to question everything about her marriage and her own identity.
* Nora's decision: Faced with the realization of her own limitations and her husband's inability to see her as an equal, Nora makes the difficult choice to leave Torvald and start her own life.
This decision is revolutionary for its time, highlighting the issues of societal expectations for women, the limitations of a patriarchal marriage, and the need for personal freedom and self-discovery.