Four founders and founders of communication: Kurt Lewin. One of the four founders of communication. Representative works: field theory in social science. Lazarsfeld (190 1 ~ 1976) is one of the four founders of communication. Representative works: People's Choice, etc. Harold lasswell (1902- 1977) is one of the four founders of communication. Representative works: Propaganda Skills in World War II, Structure and Function of Communication, etc. Carl hovland (1912-1961) is one of the four founders of communication. Representative works: communication and persuasion.

Harold lasswell is a famous political scientist, who has published more than 6 million words of academic works, covering many fields such as political science, sociology, propaganda and communication. However, many of his communication achievements are unknown to people. Most people only recognize his founder position in communication science from one sentence and three functions in his paper "The Structure and Function of Communication in Society", and can also think that he is a sociologist, psychologist and communication scholar.

Carl hovland, a famous experimental psychologist, is also an outstanding figure in propaganda and communication research. Hovland is a pioneer in measuring the degree of attitude change and verifying the communication effect by experimental methods. He introduced persuasion theory and experimental methods into communication, which made his research very practical and practical, and became a typical style of American empirical communication school.

Lazarsfeld, a famous sociologist, graduated from the University of Vienna, and received doctor's degrees in philosophy, humanities and law successively. He is one of the four founders of communication. He put forward the "two-level communication theory", which opened the way for the study of communication effect and communication mechanism. Lazarsfeld has made great contributions to research methods and is known as the "tool maker" of communication science.