A History of Personality Psychology: Part 1
Section I: General Chronology and Driving Forces of Personality
The history of personality psychology dates as far back as Ancient Greece. Indeed, philosophers since the 4th Century BCE have been trying to define exactly what it is that makes us us. In 370 BCE, Hippocrates proposed two pillars of temperament: hot/cold and moist/dry, resulting in four humors or combinations of these qualities. The hot and dry combination was referred to as yellow bile, cold and dry as black bile, hot and wet was blood and cold and wet was phlegm. Though much of the work that arose from this theory of the Four Humors was medicinal in nature, it was also hypothesized a patient's personality could be influenced by humoral imbalances.