Dale Carnegie (1888–1955) was an American writer and lecturer, best known for his groundbreaking self-help and personal development book, “How to Win Friends and Influence People,” published in 1936. Carnegie started his career as a salesperson and later became a successful public speaking coach, which led to the development of his famous courses in self-improvement, salesmanship, corporate training, public speaking, and interpersonal skills. His work emphasized the importance of personal relationships in achieving success and had a significant impact on the self-help genre. His teachings continue to influence the field of personal development and corporate training. Additionally, Carnegie wrote several other books, including “How to Stop Worrying and Start Living,” offering practical advice on handling stress and living a more fulfilling life.