c. 400 BC — 180 AD
Hippocrates & Galen: the four temperaments
Hippocrates — the father of medicine — observed that people differ by disposition in four recurring patterns. Six centuries later the physician Galen formalized them in De Temperamentis, arguably history’s first two-axis personality model. And here is the part most modern tests leave out: the four types were named for the elements from the start.The sanguine temperament was air. The choleric was fire. The melancholic was earth. The phlegmatic was water. When you take The Elements, you’re using the original vocabulary — everything since has been a rename.
1921
Carl Jung: psychological types
Jung’s Psychological Typesgave the ancient observation its modern engine: people differ along stable preference axes — extraversion vs. introversion, thinking vs. feeling. Jung himself traced his work back to Galen’s temperaments. His axes became the chassis for the Myers-Briggs sixteen types and the Insights Discovery color wheel used in boardrooms today.
1928
William Moulton Marston: the lab science behind DISC
This is the name to remember. Marston was a Harvard-trained psychologist — the same researcher whose work on systolic blood pressure became a component of the lie detector (and who, in his spare time, created Wonder Woman). His 1928 book Emotions of Normal People did something radical: instead of studying illness, he studied how healthy people behave, and mapped it onto two axes — whether a person is active or measured in how they move, and whether they read their environment through tasks or through people. Four quadrants fell out of that cross: Dominance, Inducement, Submission, Compliance — D-I-S-C. Industrial psychologists Walter Clarke and John Geier later built the assessments; today DISC instruments are used by a majority of Fortune 500 companies. The Elements sits on Marston’s exact two axes — we call them pace and focus.
1960s — 1990s
The renaming era
Merrill and Reid’s Social Stylesresearch (Driver, Expressive, Amiable, Analytical) rebuilt the same quadrants from observed workplace behavior and became the backbone of modern sales training. Don Lowry’s True Colors(1978) translated temperament into Orange, Gold, Blue, and Green for classrooms. Insights Discovery mapped Jung’s axes onto color energies for the enterprise. The DOPE bird test made it four birds. Different costumes — same body. Every one of these systems is measuring the cross you see below.
The family tree
These are the instruments built on the same two-axis science — if you’ve taken any of them, The Elements will feel like coming home:
DISC
Marston's lab science, operationalized — the corporate standard
The Four Temperaments
Hippocrates & Galen's original — our namesake elements
Social Styles
Merrill & Reid — the backbone of modern sales training
True Colors
Don Lowry's classroom translation of temperament
The DOPE Bird Test
The folk favorite — four birds, same compass
Myers-Briggs & Insights
Jung's axes — resonant cousins with a different cut
Your deep-dive report includes the full crosswalk — exactly where your DISC letter, True Color, and closest Myers-Briggs types land on your compass.
What The Elements does differently
The original language
Fire, Wind, Water, Earth — memorable enough to use mid-conversation, not a letter code you forget by Friday
Your full mix, not a box
Percentages on all four axes, plus twelve named blends — a Volcano is not a Garden
Built to read OTHERS
Spotting cues, communication playbooks, and customer lenses for every element — a working people-language
Personal, not templated
An AI insight page written to your exact mix and your actual situation — no two reports match
Why a fresh take — and an honest one
If the science is shared, why not just use DISC? Because language matters. Letters and corporate color codes describe you; the elements resonate. People forget their four-letter code by Friday — nobody forgets being told they’re Fire. Memory is the whole point of a framework you’re supposed to use on the fly, in real conversations, with real people.
And honesty matters too: The Elements, like every quadrant instrument including DISC and True Colors, is a development and communication tool, not a clinical diagnosis. You are all four elements in different measure; your mix can shift across seasons of life. That’s not a flaw — it’s the design. Use it as a mirror for yourself and a translation dictionary for everyone else. Never use it to gatekeep hiring.