Created a self-help program for confidence and success and wrote the massive bestseller How to Win Friends and Influence People in 1936.
His first job was selling correspondence courses to ranchers and then selling bacon, soap, and lard for Armour & Company.
He wrote many other books, including How to Stop Worrying and Start Living from 1948 and Lincoln the Unknown from 1932.
He was married to Dorothy Price Vanderpool from 1944 until his death in 1955. He had a daughter named Donna Dale Carnegie. His parents were James william Carnagey and Amanda Elizabeth Harbison. He had an impoverished upbringing.
He changed the spelling of his last name to reflect that of Andrew Carnegie's last name because Carnegie was one of the most popular figures of the time.