Dale Carnegie Dale Carnegie Dale Harbison Carnegie (; spelled Carnagey until c. 1922; November 24, 1888 – November 1, 1955) was an American writer and lecturer and the developer of famous 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. One of the core ideas in his books is that it is possible to
Three degrees of influence Three degrees of influence Three Degrees of Influence is a theory in the realm of social networks, proposed by Nicholas A. Christakis and James H. Fowler in 2007. It has since been explored by scientists in numerous disciplines using diverse statistical, psychological, sociological, and biological approaches. Christakis and Fowler found that social networks have great influence on individuals' behavior. But social influence does not end with the people to whom a person is directly tied. We influence our friends, who in their turn influence their friends, and so our actions can influence people we have never met, to whom we