The ancient Greeks understood psychology a lot better than they understood science.Hippocrates, the father of the Hippocratic Oath, believed that our information-gathering and decision-making processes are determined by an imbalance of 4 bodily fluids – red blood, yellow bile, black bile, and phlegm – two of which have never existed in the form that Hippocrates theorized.But the four basic temperaments that Hippocrates associated with these four fluids have lived on to be verified, codified, dignified and personified by screenwriters and novelists and social scientists* around the world. Hippocrates called these temperaments Sanguine, Choleric, Melancholic, and Phlegmatic.More than 400 years ago, Shakespeare depicted the full range of human behaviors and character types by embracing the original theories of Hippocrates. The National Library of Medicine has an interesting online exhibit about it.We see these four basic temperaments in ourselves, our family, our friends, and all the most interesting characters in every form of story-telling:The Wizard of OzLion (sanguine) Scarecrow (choleric) Dorothy (melancholic) and Tin Man (phlegmatic)Archie ComicsArchie (sanguine) Veronica (choleric) Betty (melancholic) and Jughead (phlegmatic)I Love LucyRicky (sanguine) Lucy (choleric) Fred (melancholic) Ethel (phlegmatic)Gilligan’s IslandGilligan (sanguine) the Skipper (choleric) the Professor (melancholic) Mr. Howell (phlegmatic)Star TrekCaptain Kirk (sanguine) Spock (choleric) Scotty (melancholic) Bones (phlegmatic)Magnum P.I.T.C. (sanguine) Tom (choleric) Higgins (melancholic), and Rick (phlegmatic)FriendsPhoebe and Joey (sanguine) Monica (choleric) Ross (melancholic) Rachel and Chandler (phlegmatic)SeinfeldKramer (sanguine) Elaine (choleric) George (melancholic) Jerry (phlegmatic)FrasierRoz (sanguine) Frasier (choleric) Niles (melancholic) Daphne (phlegmatic)The Golden GirlsBlanche (sanguine) Sophia (choleric) Dorothy (melancholic) Rose (phlegmatic)Sex and The CitySamantha (sanguine) Miranda (choleric) Charlotte (melancholic) Carrie (phlegmatic)Schitt’s CreekMoira (sanguine) Johnny (choleric) David (melancholic) Alexis (phlegmatic)Desperate HousewivesSusan (sanguine) Gabrielle (choleric) Bree (melancholic) Lynette (phlegmatic)Unbreakable Kimmy SchmidtKimmy (Sanguine) Jacqueline (Choleric) Titus (Melancholic) Lillian (Phlegmatic)Big Bang TheoryHoward (sanguine) Sheldon (choleric) Raj (melancholic) Leonard (phlegmatic)The OfficeMichael (sanguine) Dwight (choleric) Pam (melancholic) Jim (phlegmatic)Game of ThronesArya (sanguine) Sansa (choleric) Jon (melancholic) Bran (phlegmatic)Entertainment is the only currency with which you can purchase the time and attention of a too-busy public.An understanding of the predictable frictions between these four temperaments – and their deep and abiding need for one another – is the basis of every form of long-term entertainment. The novelists who win the Nobel and Pulitzer Prizes know this. The screenwriters of all the hit TV series know this. And the ad writers who make a difference know this.When you become intrigued with an interesting fictional character, you spend time with them,...