Given our troubled world, I find it helpful to remember that empathy is essential to human and animal nature. The study of emotion must lead us toward a deeper understanding of these universal, powerful forces that energize and transform our lives. Expression is an old friend.
I learned then that he gathered his observations over 30 years. His subjects included animals, human infants, children, adults from every walk of life, and many different cultures. Moreover, he approached the study of emotional expression from the perspective of art, literature, and inner experience, as well as from muscles and the nervous system. Although it was first published around 150 years ago (1872), Darwin's work inspires and informs contemporary research in many fields.
This work is the main contribution to interdisciplinary studies that converge in psychology and biology. It is a crucial piece of Darwin's work. If the well-known decay of the compared psychology in the early years of the 20 Century. When the genetic followers forgot about the behaviors, the psychologists did without anatomy and physiology - diminished influence on the actual contributions briefly, the culmination of modern etiology has acted in favor of rediscovering this extraordinary and even singular text.
What Darwin considers authentic expressions are precise, the reflexes and instincts that suppose not only the innate capacity to react in a determined way but also the innate acknowledgment of that expression in others.
That's a whole and unfairly not-so-known book that deserves to be recognized with significant value.