Final answer:
John Nash suffered from schizophrenia.
Step-by-step explanation:
John Nash's experiences of hearing voices and having delusions of being followed by the CIA indicate that he suffered from schizophrenia. Schizophrenia is a mental disorder characterized by hallucinations, delusions, and disorganized thinking and behavior. Individuals with schizophrenia may experience a loss of touch with reality, making it difficult to differentiate between what is real and what is not. John Nash's symptoms align with the criteria for a diagnosis of schizophrenia.
Learn more about Schizophrenia