How to Win Friends and Influence People in the late 19th and early 20th centuries. Dale Carnegie began his career not as a writer, but as a teacher of public speaking. He started out teaching night classes at a YMCA in New York and his classes became wildly popular and highly attended. The success of the classes in New York prompted YMCAs in Philadelphia and Baltimore to begin hosting the course as well. After even greater success, Carnegie decided to begin teaching the courses on his own at hotels in London, Paris, New York, Boston, Philadelphia, and Baltimore. Because he could not find any satisfactory handbook already
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