Dale Carnegie was an American writer and lecturer. He developed a series of famous courses in self-improvement, salesmanship, corporate training, public speaking, and interpersonal skills. He was the author of How to Stop Worrying and Start Living, and How to Win Friends and Influence People, which is still a bestseller today. Dale believed it’s possible to change people's behaviour by acting differently towards them. Since its founding Dale Carnegie Training has expanded into sales, leadership, presentations, and customized corporate solutions training.