Raddai Raikhlin, Ph.D., was born in Moscow in 1929. He state working at the age of 13 always continuing steadies with working for a living. In 1953 he graduated from the Naval Academy in Leningrad. He then continued his studies at the Moscow University and Institute of Energetic. He worked as en electronics engineer and in 1964 received the doctoral degree. In addition to scientific articles, he wrote popular-science articles in well-known journals. Among the patents received by them are patents for methods for receiving and transmitting gravitational waves. In 1973 he emigrated to Israel and settled in Haifa. He worked at the Technion (Israel Institute of Technology) for 10 years. After leaving the Technion his interests went to Sociology and he has been trying to design a computer model of society. In 1991 the book "Theory of Robots" was published in Russian - In the book one finds a description of the human stereotype called Robot, its features and behavior, as well as the society formed by him. The author's main interest lies with studying the cohesion within society and of discipline; he defined the conditions required for creation cohesion and optimal discipline. As he believes that social cohesion is related to religion, the author lent special attention to studying religion and comparing between different religions. This book "Fashion" presents the results of these studies in a popular form. The effect of social cohesion on the behavior of people in illustrated by means of several examples. In this connection, use is made of such social manifestations as fashion styles, dances, religion ceremonies, art and literature, etc.