In the modern world of psychology, there are theories that have long ceased to be relevant and simply do not work, according to the psychological portal Meclee on Instagram. Four temperament types One of the most well-known and ancient theories describing human personality originated in Ancient Greece. It was actively studied by physiologists, neurologists, and psychologists until the 20th century. However, conclusive evidence confirming the existence of four distinct temperament types has never been found. Therefore, today this theory can be considered outdated. There is information that cert…