Wednesday 7 May 2014

LCI Conference proceedings Richard Lynn

Race Differences in Psychopathic Personality

Richard Lynn1

1Department of Psychology, University of Ulster (retired), UK




Australian Aborigines



Sub-Saharan Africans – USA



New Zealand Maori



Native Americans –USA



South Asians – Britain 






Northeast Asians – Britain 



Race differences in psychopathic personality can be assessed by questionnaire and by behaviours such as rates of crime, inability to form long-term monogamous relationships, sexual promiscuity, inability to delay immediate gratification for a long-term advantage, drug use and abuse and an absence of altruism. Race differences in psychopathic personality assessed by these criteria are inversely related to the differences in intelligence. Race differences in IQs and psychopathic personality assessed by rates of crime are shown below. Race differences in IQ and rates of crime (odds ratios, Europeans set at 1.0). 

It is proposed that the inverse relationship between psychopathic personality and intelligence across the races is present because both characteristics were selected for in colder environments. These selected for higher intelligence as adaptations to the greater cognitive demands of survival in colder winters. They also selected against psychopathic personality because of the need for greater altruism, stronger long-term monogamous relationships, greater ability to delay immediate gratification and a reduction of aggression in for a long-term advantage and a reduction in colder environments.

Read the whole presentation here:


  1. What is interesting about the mass of data that Richard Lynn has accumulated over the past several decades is that from a biological perspective it shows clearly that lower intelligence is adaptive in almost all societies studied - in the sense that all the social disadvantages of lower intelligence which Lynn documents have no biological significance because the inverse relationship between intelligence and fertility is what matters to reproductive success.

    In a world where childhood mortality rates are so very low - even in the very worst places on the planet the childhood mortality rates are swamped by even higher fertility - so that the populations with the highest childhood mortality rates are among the fastest growing populations.

    So, from the strictly biological and evolutionary perspective of differential reproductive success, high rates of crime, promiscuity mean almost nothing in the world as it has been in recent generations.

    The major confounder to this is (certain types of) religion - which also enhance reproductive success.

    As I have often said - the future which can be extrapolated from recent demographic trends is divided between a majority of average low intelligence/ high psychoticism populations (i.e. those too 'feckless' to use reproductive control technologies) - and a minority of religious populations (who have deliberately chosen to reproduce at above-replacement levels) - some of whom will include a higher intelligence/ lower psychoticism ruling elite.

  2. Australian Aborigines IQ 62

    Is Richard Lynn still flogging that number? This doesn't give me much hope for the 2nd edition of Race Differences in Intelligence.


    1. Will try to look at Aborigine intelligence later. For the moment your linked comment (for which thanks) uses the "correcting for SES" argument. I have concerns about this procedure, and will post about it once I have finished all the conference stuff.

    2. @JT - Of course you are correct that 'correcting for SES' is nonsense, when intelligence is stratified by SES!

      But rather than quibbling over population representativeness (when there has never been any truly random IQ sample) - is there any evidence of any kind to *refute* an approx. 2SD lower average intelligence for AAs?

      So far as I can tell, all available evidence is consistent with about 2SD's lower - but I would like to know of any that isn't.

    3. Race Differences in Intelligence 2006, page 103 lists 17 studies from 1931 to 1999 g score range 52-74. Largest sample 458 9 yr olds at IQ 58. Looks pretty solid, but I would need to look at more recent data