There is no doubt that something exists in us which, when we become aware of signs of an emotion in someone else, tends to make us fall into the same emotion; but how often do we not successfully oppose it, resist the emotion, and react in quite an opposite way? Why, therefore, do we invariably give way to this contagion when we are in a group? Once more we should have to say that what compels us to obey this tendency is imitation, and what induces the emotion in us is the group's suggestive influence.
