George Berkeley IQ

George Berkeley was born in County Kilkenny, Ireland, in 1685 and entered Trinity College Dublin at 15. By 25 he had published An Essay towards a New Theory of Vision and A Treatise Concerning the Principles of Human Knowledge, arguing that material objects exist only as perceived. He spent three years in Rhode Island trying to found a college in Bermuda, then became Bishop of Cloyne in 1734. He died in Oxford in 1753.

He was never tested. A secondary tabulation of Cox's 1926 study of 301 eminent people lists a corrected estimate of 190, among her highest. Cox's scale runs about 22 points higher than modern norms, so LifeScore lists 165 with a working range of 160 to 190.

Berkeley argued that we only ever experience ideas, such as colours and shapes, never matter itself. So objects are collections of ideas, and their existence consists in being perceived, ultimately by God, which is why the tree still exists when nobody is in the quad.

In The Analyst he argued that Newton's fluxions relied on quantities that were treated as non-zero and then as zero, calling them "the ghosts of departed quantities". The criticism was fair, and mathematicians took over a century to put calculus on rigorous foundations.

The 190 is Catharine Cox's corrected estimate from her 1926 study of 301 eminent people born between 1450 and 1850. She rated each person from biographical records of what they could do as a child and young adult, then corrected for gaps in the record.

Cox's numbers sit on an old ratio-IQ scale. One secondary tabulation subtracts about 22 points for the Flynn effect, which puts George Berkeley near 170.

LifeScore lists 165, and the working range of 160 to 190 spans both figures. None of them is a test result.

See how the other famous IQ numbers trace back in where famous IQ numbers come from.

Berkeley followed an argument to its end, however strange the destination. If we only know ideas, he reasoned, belief in matter is unjustified. Pressing a premise to a surprising conclusion is pure logical reasoning, and his critique of calculus shows the same rigour in mathematics.

What supports it

• A secondary tabulation of Cox (1926) lists a corrected estimate of 190.
• He published his main works between the ages of 24 and 28.
• Historians of mathematics accept his critique of calculus as valid.

What it cannot prove

• Cox rated people from biographies, not tests, and her old ratio-style scale runs higher than modern deviation IQ, by roughly 22 points in one tabulation.
• Cox's highest figures depend on documented early achievement.
• Influence in philosophy depends on timing, institutions and readers as well as on the power of the reasoning.

George Berkeley's IQ is represented here by a retrospective estimate of 165, not a verified test result. George Berkeley is best known for exceptional logical daring. The useful question is what the surviving evidence shows, not whether a precise modern score can be recovered.

Gentle, ingenious and practical. A philosopher who denied matter and promoted tar-water as medicine.

The dominant archetype here is The Idealist. This archetype shapes decision patterns: what feels natural, what creates friction, and what blind spots tend to emerge.

Estimated IQ is 165. This is a rough estimate based on documented accomplishments and contemporary accounts, not a literal measurement.

He wrote a long, best-selling book praising tar-water, a pine-tar tonic, as a cure for almost everything.

George Berkeley's estimate of 165 falls in the profoundly gifted IQ range. Want your own number rather than George's? Take the free IQ test or the quick IQ test. See what an IQ of 165 means, place it on the IQ chart or check how rare it is with the IQ rarity calculator.