What did dale Carnegie do

Dale Carnegie was an American writer and lecturer, and the developer of courses in self-improvement, salesmanship, corporate training, public speaking, and interpersonal skills. He was a pioneer in the field of self-improvement.

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.