Framework

Method

How we use MBTI and cognitive functions as a lens for reading historical lives — not as a classification system, but as a structured way of asking better questions.

Cognitive Functions

Browse all →

Beyond the four-letter code lies the engine of personality: eight cognitive functions. Every type runs four of these in a fixed priority order — its function stack.

Extraverted Thinking

Organizes the external world through logic, efficiency, and measurable results.

Introverted Thinking

Builds internal logical frameworks; seeks precision and self-consistent systems.

Extraverted Feeling

Reads and shapes the emotional atmosphere; prioritizes group harmony.

Introverted Feeling

Maintains a private inner compass of values; seeks authenticity over approval.

Extraverted Intuition

Generates possibilities and connections; sees the world as a web of potential.

Introverted Intuition

Converges on a single deep insight; pattern recognition turned inward.

Extraverted Sensing

Fully absorbed by the physical present; high-fidelity engagement with now.

Introverted Sensing

Compares present experience to a vast internal library of past impressions.

The Function Stack

Every type uses its four functions in a fixed priority order:

Dominant

The core lens — most developed, operating effortlessly at all times.

Auxiliary

The support — balances the dominant, often opposite in E/I orientation.

Tertiary

The relief valve — develops later; a source of creativity or stress response.

Inferior

The blind spot — least conscious, often the source of greatest vulnerability.

The 16 Types

Browse all →

Sixteen distinct cognitive orientations — each a different pattern of how someone takes in experience and makes sense of it.

NT · Analysts

INTJThe Architect INTPThe Logician ENTJThe Commander ENTPThe Visionary

NF · Diplomats

INFJThe Prophet INFPThe Idealist ENFJThe Advocate ENFPThe Champion

SJ · Sentinels

ISTJThe Steward ISFJThe Guardian ESTJThe Executive ESFJThe Provider

SP · Explorers

ISTPThe Virtuoso ISFPThe Composer ESTPThe Maverick ESFPThe Performer

Historical Eras

Browse all →

We organize figures into coherent social scenes — specific worlds where people were genuinely in conversation with one another — rather than vague chronological buckets.

Ancient Athens~470 – 320 BCE The Age of Alexander~356 – 281 BCE The Roman Republic~100 BCE – 14 CE The Julio-Claudians14–68 CE The Five Good Emperors96–192 CE The Age of Justinian~518 – 565 The Tang Dynasty~618 – 756 CE The Age of Chivalry~1079 – 1204 The Age of Saladin~1169 – 1193 The Medieval Mediterranean~1154 – 1250 The Mongol Empire~1206 – 1294 The Mongol Khanates~1227 – 1368 The Age of Travelers~1245 – 1355 The Medieval Islamic World~1300 – 1360 The Mali Empire~1235 – 1360 The Ilkhanate~1256 – 1335 The Mamluk Sultanate~1250 – 1291 The Ottoman Zenith~1451 – 1566 Capetian France~1223 – 1328 Plantagenet England~1216 – 1422 The Hundred Years' War~1337 – 1453 The Wars of the Roses~1455 – 1487 The Wars of Scottish Independence~1286 – 1357 The Age of Exploration~1415 – 1522 The Portuguese Indian Ocean~1497 – 1580 The Aztec Empire~1428 – 1502 The Conquest of Mexico~1519 – 1550 The Italian Renaissance~1452 – 1527 The Age of the Borgias~1492 – 1513 The Reformation~1517 – 1555 Sengoku Japan~1560 – 1615 Tudor England~1509 – 1547 Elizabethan England~1564 – 1616 The Napoleonic Age~1762 – 1821 Classical Vienna~1750 – 1827 The German Enlightenment~1724 – 1803 Petrine Russia~1672 – 1730 Catherinian Russia~1729 – 1855 The Enlightenment~1715 – 1789 The Habsburg Court~1740 – 1790 Frederician Prussia~1712 – 1786 The French Revolution~1774 – 1799 Victorian Britain~1805 – 1870 Scientific Paris~1859 – 1958 The Founding Generation of USA~1722 – 1825 The Young Republic of USA~1777 – 1863 The Civil Rights Movement~1856 – 1968 Contemporary~1980 – present

Entry Tags

Tags signal how a figure sits in history — not a judgment of character, but a calibration tool for the reader.

iconic

Universally recognized across cultures and time — you can't study the period without them.

renown

Significant within educated circles, often studied in their domain, well-documented.

notable

Held a real documented role in history; acted independently; known to historians of the period.

infamous

Historical weight comes with moral gravity — contested, harmful, or resistant to comfortable framing.

obscure

Minimally documented, included for contextual or relational insight rather than independent significance.

Evidence & Interpretation

Typing historical figures is inherently speculative. We weigh primary sources — letters, journals, contemporary accounts — more heavily than secondary biographies, and look for patterns of behavior over a lifetime rather than isolated incidents.

We acknowledge that genius often muddies type expression, and that historical context — social expectations, survival pressures — can mask a person's natural cognitive preferences. When the evidence is thin or genuinely ambiguous, we say so.

The Role of AI

AI assists with research and cross-referencing biographies. Every final verdict and essay is shaped and owned by a human hand.

Open Dialogue

Disagreement is expected and welcomed. These essays are meant to start a conversation, not end it.