At the young age of 31, Nash began to show signs of mental illness. After spending more than a decade in and out of psychiatric hospitals and receiving multiple types of treatments for paranoid schizophrenia, Nash’s illness started to show signs of improvement. By the mid 1980’s, John Nash was was able to return to his academic work. Just a few years earlier in 1978, John was awarded the John Von Neumann Theory Prize. In 1995, Nash began in informal association with Princeton University and became a research mathematician at the institution.