Stephen Jay Gould and The Bell Curve

If ability is at least partly inherited, then it is likely that social classes will arise. If social class is partly explained by genes, then the theory that class is entirely due to ‘unfair’ advantages is false.

If it is not known how much social class is due to genetic and how much to other factors, then it cannot be assumed that intervention will move things towards a ‘fairer’ position. This may explain the reactions of writers such as Stephen Jay Gould to The Bell Curve.*

One of the central arguments of The Bell Curve is that America’s upper class is an elite with relatively high average IQ, which has arisen because intelligence is partly heritable. Gould asserts that this argument requires

the validity of four shaky premises, [i.e. intelligence] must be depictable as a single number, capable of ranking people in linear order, genetically based, and effectively immutable. If any of these premises are false, the entire argument collapses.**

The validity of The Bell Curve’s explanation of class does not depend on intelligence being ‘immutable’. Gould seems to be confusing questions of fact with questions of policy.

Nor does the explanation depend on intelligence being depictable as a single number. Whether intelligence, or ability in general, is heritable is a separate question from how well a single variable, such as IQ, is capable of measuring it.


* Richard Herrnstein and Charles Murray, The Bell Curve, Free Press 1994.
** Stephen Jay Gould, The Mismeasure of Man, Penguin 1997, p.368.

Financing special education

From Stephen Jay Gould’s The Mismeasure of Man:

The difference between strict hereditarians and their opponents is not, as some caricatures suggest, the belief that a child’s performance is all inborn or all a function of environment and learning. [...] The differences are more a matter of social policy and educational practice.

Hereditarians view their measures of intelligence as markers of permanent, inborn limits. Children, so labelled, should be sorted, trained according to their inheritance and channelled into professions appropriate for their biology. Mental testing becomes a theory of limits.

Antihereditarians [...] test in order to identify and help. Without denying the evident fact that not all children, whatever their training, will enter the company of Newton and Einstein, they emphasize the power of creative education to increase the achievements of all children, often in extensive and unanticipated ways. [...]

A partially inherited low IQ might be subject to extensive improvement through proper education. And it might not. The mere fact of its heritability permits no conclusion. *

The debate about heritability of IQ has become less about the science of whether, and to what extent, intelligence is inherited; and more about the politics of whether resources should be devoted to helping those with a relatively low measured IQ to ‘catch up’.

What Gould, and others, tend to omit from their discussions is the question of whether ‘should’ in this context means voluntary or compulsory contributions.

It might mean that people should be encouraged to donate to voluntary organisations who would then provide what Gould refers to above as ‘proper education’. In practice, however, it usually means that the government should devote tax revenue to the problem, implying that the ‘contributions’ are to be collected coercively.

* Stephen Jay Gould, The Mismeasure of Man, Penguin 1997, pp.182-183, 186.

John Stuart Mill — blank-slate collectivist?

John Stuart Mill (1806-1873)

The following extract* from John Stuart Mill’s Autobiography is cited in Steven Pinker’s The Blank Slate.

I have long felt that the prevailing tendency to regard all the marked distinctions of human character as innate, and in the main indelible, and to ignore the irresistible proofs that by far the greater part of those differences, whether between individuals, races, or sexes, are such as not only might but naturally would be produced by differences in circumstances, is one of the chief hindrances to the rational treatment of great social questions, and one of the greatest stumbling blocks to human improvement.

This tendency [... is] so agreeable to human indolence, as well as to conservative interests generally, that unless attacked at the very root, it is sure to be carried to an even greater length than is really justified by the more moderate forms of intuitional philosophy. [italics added]

Mill makes it clear that a reason for his dislike of the idea of innate characteristics is his associating it with ‘conservative interests’. Mill was presumably hostile to ‘conservative interests’ because he thought of himself as a ‘social reformer’.

It is not clear what Mill could have meant by ‘irresistible proofs’ that individual differences are predominantly due to environment. There was little statistical data on the issue of human heritability when he wrote this in the 1870s.

Nowadays prejudice against innate characteristics, on the grounds that belief in them is an obstacle to social reform, has become a common attitude.

* Steven Pinker, The Blank Slate, Penguin Books, 2003, p.18.