Godfrey Harold (G.H.) Hardy (1877–1947) was a British mathematician who felt that the approach of the elementary proof lacked the depth needed to solve the Prime Number Theorem, which had only been proven using non-elementary complex analysis. He was shown to be wrong when Paul Erdős devised an elementary proof. Hardy was a pure mathematician and was not interested in giving mathematics practical applications. He wrote an essay about his field called A Mathematician's Apology. Hardy was an atheist and was left-wing in his political views.