Dale Carnegie was an American writer, lecturer, and self-improvement pioneer. Born into poverty on a Missouri farm in 1888, Carnegie developed courses in public speaking, salesmanship, and interpersonal skills. His bestselling book "How to Win Friends and Influence People," published in 1936, has sold over 30 million copies worldwide and remains popular today. Carnegie's work emphasized the importance of genuine interest in others, avoiding criticism, and appealing to people's desires. He founded Dale Carnegie Training, which continues to offer professional development courses globally. Carnegie also authored other influential works like "How to Stop Worrying and Start Living" and "Lincoln the Unknown." His principles on human relations and self-improvement have inspired millions to achieve personal and professional success. Dale Carnegie passed away in 1955, but his legacy as a thought leader in personal development endures.