Historical Figure MBTIOn Carl Jung & Personality Types
Where these ideas come from, what they actually mean, and how this archive uses them.
Most people come to Jung backwards. I certainly did. I found MBTI first — the sixteen types, the four-letter codes, the cognitive function stacks — and only later started tracing those ideas back to their source. When I did, I found something messier, stranger, and more alive than the system I had inherited.
Carl Jung published Psychological Types in 1921. It was not a clean framework. It was a long, difficult, somewhat sprawling book — part clinical observation, part philosophy, part cultural history — and it arrived at its conclusions reluctantly, the way honest thinking usually does. Jung was not trying to build a personality sorter. He was trying to understand why intelligent people could look at the same situation and see completely different things.
His answer was that people are not simply biased or wrong. They are oriented differently. Some habitually direct their energy outward toward the world and other people; others direct it inward toward their inner life and experience. Jung called these orientations extraversion and introversion — terms he essentially coined, though they have since drifted somewhat from what he meant.
But extraversion and introversion alone were not enough. Jung also identified four fundamental psychological functions — four different ways the mind processes experience:
Thinking
Evaluates through logic and impersonal principles. Asks: is this true? Is this consistent?
Feeling
Evaluates through values and relational significance. Asks: does this matter? Does this align with what I care about?
Sensation
Perceives through the concrete, present, and literal. Asks: what is actually here, right now, in front of me?
Intuition
Perceives through patterns, connections, and possibilities. Asks: what does this mean? Where is this going?
Thinking and Feeling are what Jung called judging functions — they evaluate and decide. Sensation and Intuition are perceiving functions — they gather and receive. In his original model, everyone has access to all four, but one tends to be dominant, one tends to be relatively developed, and one — what he called the inferior function — tends to remain largely unconscious, underdeveloped, and capable of causing significant trouble when life forces you to rely on it.
Jung described eight psychological types in total: each of the four functions in either an extraverted or introverted orientation. He was not proposing sixteen. That came later.
How We Got to Sixteen
Isabel Briggs Myers and her mother Katharine Cook Briggs spent decades building on Jung's framework. They added a fourth dimension — Judging versus Perceiving, describing how someone orients toward the outer world — and in doing so produced something Jung himself had not quite arrived at: a clean, navigable system of sixteen types.
Isabel Myers was not an academic psychologist. She was a mystery writer with a deep conviction that understanding personality could reduce conflict, help people find work that suited them, and generally make human life a little less unnecessarily difficult. She was, in that sense, pragmatic in the best way. She took something profound and made it usable.
The result — what we now call MBTI — organizes everyone along four axes:
Where you direct your energy — outward toward people and action, or inward toward ideas and reflection
How you perceive — through concrete sensory detail and present reality, or through patterns and future possibilities
How you judge — through impersonal logic and principles, or through personal values and relational impact
How you orient to the world — with structure and closure, or with openness and flexibility
Combine those four axes, and you get sixteen distinct types. Each one represents a different cognitive orientation — a different pattern of how someone takes in experience and makes sense of it.
The Sixteen Types
Here they are. Each one is a link — if you want to explore how a type has shown up across history, click through.
I want to say something honest about these categories: they are not cages. Jung himself was insistent on this. He wrote that his types were "nothing but orientation-values, the actual performance of which is kept in check by the other functions." Nobody is purely one thing. The four-letter code is a center of gravity, not a complete map.
What makes the system useful — and this is what I've come to believe after typing nearly two hundred historical figures — is not that it tells you exactly what someone is, but that it gives you a structured language for asking how someone is oriented. That distinction matters.
Cognitive Functions: The Layer Beneath the Letters
Here is where it gets interesting. And more complicated.
Each of the sixteen types isn't just defined by its four letters — it's defined by a specific stack of cognitive functions. Each function can be either extraverted or introverted, which doubles the original four into eight distinct mental processes:
Every type uses four of these eight functions in a specific order. An INTJ, for instance, leads with Introverted Intuition (Ni), supported by Extraverted Thinking (Te), with Introverted Feeling (Fi) as a tertiary function, and Extraverted Sensing (Se) as the inferior — often underdeveloped, often the source of their blind spots.
This is where Jung's original insight about the inferior function becomes relevant again. The function at the bottom of the stack is not absent. It is simply less accessible, less controlled, and more prone to becoming a point of vulnerability or unconscious expression. INTJs who ignore their Se, for example, may become disconnected from physical reality in ways that eventually catch up with them. INFPs who ignore their Te may find themselves unable to execute the very things they care most about.
The inferior function is not a weakness to fix. It is a part of you that insists on existing.
That framing — functions not as separate from us but as parts of us with their own persistence and their own claims on our lives — feels very Jungian to me. And it is part of why I find cognitive functions more interesting than the four letters alone.
What This Archive Does with All of This
I want to be honest about how I use these frameworks, because I think honesty matters here.
When I type a historical figure, I am not diagnosing them. I am not claiming certainty about someone who lived centuries ago and who cannot speak for themselves. I am doing something more like literary interpretation — reading the available record of a life and asking: what cognitive orientation best explains the pattern of choices, relationships, and failures I see here?
Sometimes the answer feels very clear. Napoleon's Te — his need to externalize, organize, and command — shows up so consistently across every domain of his life that it is hard to see him any other way. Plato's Ni — that pull toward an ideal, invisible, more-real-than-real realm beyond the sensory — is embedded in the actual structure of his philosophy.
Other times it is genuinely uncertain, and I try to say so.
What I think the cognitive function framework does best — better than the four letters alone — is help explain how someone thought, not just what they thought. Two people can both value truth and yet pursue it in completely different ways: one through systemic external analysis (Te), one through internal logical consistency (Ti). Two people can both be deeply compassionate and yet express it differently: one attuned to the room's emotional temperature (Fe), one maintaining a private inner compass of personal loyalty (Fi). The letters tell you the shape; the functions tell you something about the texture.
That texture is what I find most interesting — and most useful — when reading historical lives.
A Note on What Jung Would Have Said
I think Jung would have had complicated feelings about this archive. On one hand, the animating spirit — that individual psychological differences are real, meaningful, and worth taking seriously — is something he spent his career defending against people who wanted to reduce everything to environment or biology alone. He would probably have appreciated the curiosity.
On the other hand, he was deeply suspicious of systematization for its own sake. He wrote that "every human being is a new experiment of life and an exception to the rule." He was more interested in the individuation process — the lifelong project of becoming more fully and honestly yourself, integrating the shadow rather than suppressing it — than in sorting people into boxes.
I try to hold both of those things at once. The boxes are useful. They are not the point.
The figures in this archive were not sixteen types. They were individuals — complicated, contradictory, shaped by culture and circumstance, often blind to themselves in ways they could not have named. What the framework does is give me a structured language for asking deeper questions about them. And what I hope comes through in each essay is not the label at the end, but the life it was arrived at through.
Jung believed that the psyche was always trying to move toward wholeness. I believe that too. And I think one small way of honoring that project is to take seriously the question of how different people are oriented — how a person is wired, at some fundamental level, to meet the world — and to sit with that question carefully rather than answering it too quickly.
That is what this archive is trying to do.
