Some emotions are indeed universal in scope. Happiness, anger, fear, and sadness produce similar facial expressions, which are recognizable in cultures outside of Western civilization. This shared reaction illustrates Darwin's belief that emotions are instinctive responses that evolved from a crucial need to develop multiple survival techniques.

Although certain emotions are shared, individual expression of that emotion is what makes it appear to be different. Each person's reaction to a situation is subjective, and how that situation is interpreted is based on personal beliefs, past experiences, and physical capabilities. The level of intensity at which the emotion is felt and the individual's dramatic expression of it are what make our communication of emotions different.