John Nash is an underrated person in history because he used mathematics to beat schizophrenia.In 2023 I was going about my day when I came across a movie on YouTube.The movie was about John Nash a man who grew ill with schizoprenia but won against it.He won against schizophrenia using theories in math amidst this he also came up with mathematical theories.This is a person I believe is underrated in history.