— Occupational IQ research

Average IQ of philosophers: 129

Updated 23 May 2026 · Sources: ETS GRE Verbal data, Hauser (2002) occupational sampling

Philosophers average an IQ of 129 — the 97th percentile of the adult population. This is the highest verbal-reasoning average of any academic discipline measured by graduate-school entry data. The figure is derived from ETS GRE Verbal score distributions by intended field of study, where philosophy applicants outscore every other discipline including English literature, classics, and the sciences.

Where the 129 number comes from

The 129 estimate is not a direct measurement — it is a conversion. Two source streams support it:

1. ETS GRE Verbal score conversions. The Educational Testing Service publishes mean GRE Verbal scores by intended graduate field annually. Philosophy applicants have ranked first or second in Verbal every published year since the 1980s. Converting GRE Verbal percentiles to IQ-scale equivalents using the score's normed distribution (mean 150, SD 8.75 on the current 130-170 scale) yields a Verbal IQ in the 128-131 range for typical philosophy PhD applicants.
2. Occupational sampling studies. Hauser's 2002 review of occupational IQ literature placed academic philosophy among the highest-IQ professions on record, comparable to physicists, mathematicians, and surgeons.

Philosophers vs. other fields — IQ comparison

Approximate average IQ by profession, drawn from the same GRE-converted and occupational sources:

Philosophy's edge is concentrated in the verbal axis. On quantitative reasoning, physicists and mathematicians outscore philosophers; on verbal reasoning, philosophy outscores every science.

Why philosophers cluster at the top

The discipline selects for, and then trains, the exact mental operations verbal IQ tests measure:

• Precise word use. A philosopher's day-job is distinguishing terms that look synonymous but aren't. This is the GRE Verbal sentence-equivalence task at a graduate level.
• Long inference chains. Working through a proof in epistemology or philosophy of mind requires holding 6-10 premises in working memory while testing implications. That's exactly what matrix reasoning tasks measure.
• Definition-building. Constructing a non-trivial necessary-and-sufficient definition (the classic philosophical exercise) loads heavily on abstract relational reasoning.
• Tolerance for unresolved problems. This is a personality trait, not IQ — but it correlates with the sustained-attention components measured by IQ tests.

What the 129 number does not mean

An occupational average is a statistical mean, not a gate. The within-profession standard deviation is typically 10-15 IQ points, which means:

• Plenty of successful philosophers score 115 — they make up the difference with persistence, scholarly depth, and specialisation
• Plenty of philosophers score 145+ — the field has a long upper tail
• Conscientiousness, deep domain knowledge, emotional regulation, and motivation account for more variance in actual academic output than the gap between IQ 120 and IQ 135
• The 129 figure describes working philosophers in academia — a self-selected group at the end of a long filter. People who studied philosophy and didn't pursue it professionally are not in the sample

How to read your own score against this average

If you've taken Core Brain or another calibrated test and want to know how your score compares to philosophers:

• 119–139: right in the typical philosopher range
• 140+: you have meaningful cognitive headroom; the field's abstract demands are likely to feel comfortable rather than effortful
• 100–118: entirely within reach of the profession with discipline and focus — most working philosophers below the mean rely more on writing routines and specialisation than on raw speed
• Below 100: philosophy as a hobby and intellectual pursuit is open to everyone regardless of score; professional academia at the doctoral level is harder but not impossible

Frequently asked questions

Related profession comparisons

• Research Scientists — average IQ 130
• Surgeons — average IQ 127
• Physicists — average IQ 132
• Mathematicians — average IQ 132
• University Professors — average IQ 126

Related reading

• What does an IQ of 130 mean?
• Full IQ-to-percentile chart
• What is the average IQ?
• The g-factor — what IQ actually measures

Sources: Educational Testing Service, GRE Guide to the Use of Scores 2023-24 (Verbal Reasoning mean scores by intended graduate major); Hauser, R. (2002), Meritocracy, cognitive ability, and the sources of occupational success, CDE Working Paper 98-07, University of Wisconsin-Madison Center for Demography and Ecology; Gottfredson, L. (1997), Why g matters: The complexity of everyday life, Intelligence 24(1).