Dale Carnegie (; spelled Carnagey until c. 1922; November 24, 1888 – November 1, 1955) was an American writer and lecturer, and the developer of courses in self-improvement, salesmanship, corporate training, public speaking, and interpersonal skills. Born into poverty on a farm in Missouri, he was the author of "How to Win Friends and Influence People" (1936), a bestseller that remains popular today. He also wrote "How to Stop Worrying and Start Living" (1948), "Lincoln the Unknown" (1932), and several other books.