Why Hasn't Natural Selection Eliminated Heritable Disease? - Facts So Romantic

John Charles Martin "Johnny" Nash was a teen when he first started hearing a voice in his head. A born-again Christian, he interpreted this voice as God speaking to him. Once, he walked into the middle of a busy highway because the voice said he should. He was an accomplished chess player and math whiz, but playing and calculating became increasingly hard. It wasn't long until a psychiatrist diagnosed him with schizophrenia.