Jewish Accomplishment

Charles Murray, author of The Bell Curve, writing in Commentary Magazine:

To get a sense of the density of accomplishment these numbers represent, I will focus on 1870 onward, after legal emancipation had been achieved throughout Central and Western Europe. How does the actual number of significant figures compare to what would be expected given the Jewish proportion of the European and North American population? From 1870 to 1950, Jewish representation in literature was four times the number one would expect. In music, five times. In the visual arts, five times. In biology, eight times. In chemistry, six times. In physics, nine times. In mathematics, twelve times. In philosophy, fourteen times.

Disproportionate Jewish accomplishment in the arts and sciences continues to this day. My inventories end with 1950, but many other measures are available, of which the best known is the Nobel Prize. In the first half of the 20th century, despite pervasive and continuing social discrimination against Jews throughout the Western world, despite the retraction of legal rights, and despite the Holocaust, Jews won 14 percent of Nobel Prizes in literature, chemistry, physics, and medicine/physiology. In the second half of the 20th century, when Nobel Prizes began to be awarded to people from all over the world, that figure rose to 29 percent. So far, in the 21st century, it has been 32 percent. Jews constitute about two-tenths of one percent of the world’s population. You do the math.

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What accounts for this remarkable record? A full answer must call on many characteristics of Jewish culture, but intelligence has to be at the center of the answer. Jews have been found to have an unusually high mean intelligence as measured by IQ tests since the first Jewish samples were tested. (The widely repeated story that Jewish immigrants to this country in the early 20th century tested low on IQ is a canard.) Exactly how high has been difficult to pin down, because Jewish sub-samples in the available surveys are seldom perfectly representative. But it is currently accepted that the mean is somewhere in the range of 107 to 115, with 110 being a plausible compromise.

The IQ mean for the American population is “normed” to be 100, with a standard deviation of 15. If the Jewish mean is 110, then the mathematics of the normal distribution says that the average Jew is at the 75th percentile. Underlying that mean in overall IQ is a consistent pattern on IQ subtests: Jews are only about average on the subtests measuring visuo-spatial skills, but extremely high on subtests that measure verbal and reasoning skills.

A group’s mean intelligence is important in explaining outcomes such as mean educational attainment or mean income. The key indicator for predicting exceptional accomplishment (like winning a Nobel Prize) is the incidence of exceptional intelligence. Consider an IQ score of 140 or higher, denoting the level of intelligence that can permit people to excel in fields like theoretical physics and pure mathematics. If the mean Jewish IQ is 110 and the standard deviation is 15, then the proportion of Jews with IQ’s of 140 or higher is somewhere around six times the proportion of everyone else.

The imbalance continues to increase for still higher IQ’s. New York City’s public-school system used to administer a pencil-and-paper IQ test to its entire school population. In 1954, a psychologist used those test results to identify all 28 children in the New York public-school system with measured IQ’s of 170 or higher. Of those 28, 24 were Jews.

After considering a number of hypotheses to explain this phenomenon (most interesting of which is that the sociological impact of takanat Yehoshua ben Gamla, Murray comes to the following conclusion:

I offer the Babylonian captivity as a concrete mechanism whereby Jewish intelligence may have been elevated very early, but I am not wedded to it. Even without that mechanism, there is reason to think that selection for intelligence antedates the 1st century C.E.

From its very outset, apparently going back to the time of Moses, Judaism was intertwined with intellectual complexity. Jews were commanded by God to heed the law, which meant they had to learn the law. The law was so extensive and complicated that this process of learning and reviewing was never complete. Moreover, Jewish males were not free to pretend that they had learned the law, for fathers were commanded to teach the law to their children. It became obvious to all when fathers failed in their duty. No other religion made so many intellectual demands upon the whole body of its believers. Long before Joshua ben Gamla and the destruction of the Second Temple, the requirements for being a good Jew had provided incentives for the less intelligent to fall away.

Assessing the events of the 1st century C.E. thus poses a chicken-and-egg problem. By way of an analogy, consider written Chinese with its thousands of unique characters. On cognitive tests, today’s Chinese do especially well on visuo-spatial skills. It is possible, I suppose, that their high visuo-spatial skills have been fostered by having to learn written Chinese; but I find it much more plausible that only people who already possessed high visuo-spatial skills would ever devise such a ferociously difficult written language. Similarly, I suppose it is possible that the Jews’ high verbal skills were fostered, through secondary and tertiary effects, by the requirement that they be able to read and understand complicated texts after the 1st century C.E.; but I find it much more plausible that only people who already possessed high verbal skills would dream of installing such a demanding requirement.

This reasoning pushes me even farther into the realm of speculation. Insofar as I am suggesting that the Jews may have had some degree of unusual verbal skills going back to the time of Moses, I am naked before the evolutionary psychologists’ ultimate challenge. Why should one particular tribe at the time of Moses, living in the same environment as other nomadic and agricultural peoples of the Middle East, have already evolved elevated intelligence when the others did not?

At this point, I take sanctuary in my remaining hypothesis, uniquely parsimonious and happily irrefutable. The Jews are God’s chosen people.