This book is very popsci and can be read in 1 day for any reasonably fast reader. It doesnt contain much new information to anyone who has read a few books on the topic. As can be seen below, it has a lot of nonsense\/errors since clearly the author is not used to this area of science. It is not recommended except as a light introduction to people with political problems with these facts.<\/p>\n
http:\/\/gen.lib.rus.ec\/book\/index.php?md5=7a48b9a42d89294ca1ade9f76e26a63c<\/p>\n
https:\/\/www.goodreads.com\/book\/show\/18667960-a-troublesome-inheritance?from_search=true<\/p>\n
<\/p>\n
But\u00a0 a\u00a0 drawback\u00a0 o f\u00a0 the\u00a0 system\u00a0 is\u00a0 its\u00a0 occasional\u00a0 drift\u00a0 toward <\/span> <\/p>\n Wrong quote origin. http:\/\/en.wikiquote.org\/wiki\/Max_Planck<\/p>\n >A new scientific<\/a> truth<\/a> does not triumph by convincing its opponents and making them see the light<\/a>, but rather because its opponents eventually die<\/a>, and a new generation grows up that is familiar with it.<\/strong><\/p>\n <\/p>\n –<\/p>\n Academics, who are obsessed with intelligence, fear the discovery <\/span> <\/p>\n We have found a number of SNPs already. And we have already begun counting them in racial groups. See e.g.: http:\/\/openpsych.net\/OBG\/2014\/05\/opposite-selection-pressures-on-stature-and-intelligence-across-human-populations\/<\/p>\n <\/p>\n –<\/p>\n <\/p>\n It s social behavior that is of relevance for understanding pivotal\u2014 <\/span> <\/p>\n See: https:\/\/www.goodreads.com\/book\/show\/3026168-the-expanding-circle<\/p>\n <\/p>\n –<\/p>\n <\/p>\n The\u00a0 lure\u00a0 of\u00a0 Galton\u2019s\u00a0 eugenics\u00a0 was\u00a0 his\u00a0 belief\u00a0 that\u00a0 society\u00a0 would <\/span> <\/p>\n Obviously wrong.<\/p>\n <\/p>\n –<\/p>\n <\/p>\n The\u00a0 principal\u00a0 organizer\u00a0 of\u00a0 the\u00a0 new\u00a0 eugenics\u00a0 movement\u00a0 was <\/span> <\/p>\n Well, about that… In this century europeans will be <50% in the US. I wonder if the sociologists will then stop talking about minority, as if that somehow makes a difference.<\/p>\n <\/p>\n –<\/p>\n <\/p>\n One\u00a0 of\u00a0 the\u00a0 most\u00a0 dramatic\u00a0 experiments\u00a0 on\u00a0 the\u00a0 genetic\u00a0 control\u00a0 of <\/span> <\/p>\n Didnt know this one. The ref is:<\/p>\n N icholas\u00a0 Wade,\u00a0 \u201cN ice\u00a0 R a ts,\u00a0 N asty\u00a0 R a ts:\u00a0 Maybe\u00a0 I t \u2019s\u00a0 All\u00a0 in\u00a0 the\u00a0 G en es,\u201d <\/p>\n –<\/p>\n <\/p>\n Rodents and humans use many of the same genes and\u00a0 brain regions <\/span> <\/p>\n This sentence is nonsensical.<\/p>\n <\/p>\n –<\/p>\n <\/p>\n Standing\u00a0 in\u00a0 sharp\u00a0 contrast\u00a0 to\u00a0 the\u00a0 economists\u2019\u00a0 working\u00a0 assumption <\/span> <\/p>\n Marked sentence is nonsensical.<\/p>\n <\/p>\n –<\/p>\n <\/p>\n Turning to economic indicators, they find that national\u00a0 IQ scores <\/span> <\/p>\n More conceptual confusion.<\/p>\n <\/p>\n –<\/p>\n <\/p>\n And\u00a0 indeed\u00a0 with\u00a0 Lynn\u00a0 and\u00a0 Vanhanen\u2019s correlations,\u00a0 it\u00a0 is\u00a0 hard to<\/span> <\/p>\n Ron Unz, the cherry picker. http:\/\/conservativetimes.org\/?p=11790<\/p>\n <\/p>\n –<\/p>\n <\/p>\n East\u00a0 Asia\u00a0 is\u00a0 a\u00a0 vast counterexample to the\u00a0 Lynn\/Vanhanen\u00a0 thesis. <\/span> <\/p>\n No. But it does disprove the claim that IQs are just GDPs. The oil states have low IQs and had that both before and after they got rich on oil, and will have in the future when they run out of oil again. Money cannot buy u intelligence (yet).<\/p>\n <\/p>\n –<\/p>\n <\/p>\n From\u00a0 about\u00a0 9 0 0\u00a0 a d\u00a0\u00a0 to\u00a0 1700\u00a0 a d ,\u00a0 Ashkenazim\u00a0 were\u00a0 concentrated <\/span> <\/p>\n More conceptual confusion. One cannot use % on IQs becus IQs are not ratio scale and hence division makes no sense. https:\/\/en.wikipedia.org\/wiki\/Levels_of_measurement#Comparison<\/p>\n","protected":false},"excerpt":{"rendered":" This book is very popsci and can be read in 1 day for any reasonably fast reader. It doesnt contain much new information to anyone who has read a few books on the topic. As can be seen below, it has a lot of nonsense\/errors since clearly the author is not used to this area […]<\/p>\n","protected":false},"author":17,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1839,1898,1624,1921],"tags":[1989],"class_list":["post-4213","post","type-post","status-publish","format-standard","hentry","category-psychometics","category-economics","category-evolutionary-psychology","category-sociology","tag-population-genetics-2","entry"],"_links":{"self":[{"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/posts\/4213","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/comments?post=4213"}],"version-history":[{"count":5,"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/posts\/4213\/revisions"}],"predecessor-version":[{"id":4337,"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/posts\/4213\/revisions\/4337"}],"wp:attachment":[{"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/media?parent=4213"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/categories?post=4213"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/tags?post=4213"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nextreme\u00a0 conservatism.\u00a0 Researchers\u00a0 get\u00a0 attached\u00a0 to\u00a0 the\u00a0 view\u00a0 of their <\/span>
\nfield\u00a0 they\u00a0 grew\u00a0 up\u00a0 with\u00a0 and,\u00a0 as\u00a0 they\u00a0 grow\u00a0 older,\u00a0 they\u00a0 may\u00a0 gain\u00a0 the <\/span>
\ninfluence\u00a0 to thwart change.\u00a0 For\u00a0 50\u00a0 years\u00a0 after it was\u00a0 first proposed, <\/span>
\nleading geophysicists\u00a0 strenuously resisted the idea that the continents <\/span>
\nhave\u00a0 drifted\u00a0 across\u00a0 the\u00a0 face\u00a0 of\u00a0 the\u00a0 globe.\u00a0 \u201cKnowledge\u00a0 advances, <\/span>
\nfuneral\u00a0 by funeral,\u201d\u00a0 the economist Paul\u00a0 Samuelson\u00a0 once\u00a0 observed.<\/span><\/p>\n
\nof\u00a0 a\u00a0 gene\u00a0 that\u00a0 will\u00a0 prove\u00a0 one\u00a0 major\u00a0 race\u00a0 is\u00a0 more\u00a0 intelligent\u00a0 than <\/span>
\nanother.\u00a0 But\u00a0 that\u00a0 is\u00a0 unlikely\u00a0 to\u00a0 happen\u00a0 anytime\u00a0 soon.\u00a0 Although<\/span>
\nintelligence has a genetic basis, no genetic variants that enhance intel\u00ad<\/span>
\nligence\u00a0 have\u00a0 yet\u00a0 been\u00a0 found.\u00a0 The\u00a0 reason,\u00a0 almost\u00a0 certainly,\u00a0 is\u00a0 that <\/span>
\nthere\u00a0 are\u00a0 a\u00a0 great\u00a0 many\u00a0 such\u00a0 genes,\u00a0 each\u00a0 of\u00a0 which\u00a0 has\u00a0 too\u00a0 small\u00a0 an <\/span>
\neffect\u00a0 to\u00a0 be\u00a0 detectable\u00a0 with\u00a0 present\u00a0 methods.8\u00a0 If\u00a0 researchers\u00a0 should <\/span>
\none\u00a0 day\u00a0 find\u00a0 a\u00a0 gene\u00a0 that\u00a0 enhances\u00a0 intelligence\u00a0 in\u00a0 East\u00a0 Asians,\u00a0 say, <\/span>
\nthey can\u00a0 hardly argue on that\u00a0 basis that East Asians are more\u00a0 intelli\u00ad<\/span>
\ngent than other races, because hundreds of similar genes remain to be <\/span>
\ndiscovered\u00a0 in\u00a0 Europeans\u00a0 and\u00a0 Africans.<\/span>
\nEven\u00a0 if\u00a0 all\u00a0 the\u00a0 intelligence-enhancing\u00a0 variants\u00a0 in\u00a0 each\u00a0 race\u00a0 had <\/span>
\nbeen identified, no one would try to compute intelligence on the basis <\/span>
\nof genetic\u00a0 information:\u00a0 it would\u00a0 be\u00a0 far easier\u00a0 just to\u00a0 apply\u00a0 an\u00a0 intelli\u00ad<\/span>
\ngence test.\u00a0 But IQ\u00a0 tests already\u00a0 exist, for what\u00a0 they may\u00a0 be\u00a0 worth.<\/span><\/p>\n
\nand otherwise imperfectly explained\u2014 events in history and econom\u00ad<\/span>
\nics.\u00a0 Although\u00a0 the\u00a0 emotional\u00a0 and\u00a0 intellectual\u00a0 differences\u00a0 between\u00a0 the <\/span>
\nworld\u2019s peoples\u00a0 as\u00a0 individuals are slight enough,\u00a0 even a\u00a0 small\u00a0 shift in <\/span>
\nsocial\u00a0 behavior\u00a0 can\u00a0 generate\u00a0 a\u00a0 very\u00a0 different\u00a0 kind\u00a0 of society.\u00a0 Tribal <\/span>
\nsocieties, for instance, are organized on the basis of kinship and differ <\/span>
\nfrom\u00a0 modern\u00a0 states\u00a0 chiefly\u00a0 in\u00a0 that\u00a0 people\u2019s\u00a0 radius\u00a0 of trust\u00a0 does\u00a0 not <\/span>
\nextend too far beyond the family and tribe.\u00a0 But in this small variation <\/span>
\nis\u00a0 rooted\u00a0 the\u00a0 vast\u00a0 difference\u00a0 in\u00a0 political\u00a0 and\u00a0 economic\u00a0 structures <\/span>
\nbetween tribal and modern societies. Variations in another genetically <\/span>
\nbased behavior, the readiness to punish those who violate social rules, <\/span>
\nmay explain why\u00a0 some societies\u00a0 are\u00a0 more conformist than others.<\/span><\/p>\n
\nbe\u00a0 better\u00a0 off\u00a0 if\u00a0 the\u00a0 intellectually\u00a0 eminent\u00a0 could\u00a0 be\u00a0 encouraged\u00a0 to <\/span>
\nhave\u00a0 more\u00a0 children.\u00a0 W hat\u00a0 scholar\u00a0 could\u00a0 disagree\u00a0 with\u00a0 that?\u00a0 More <\/span>
\nof\u00a0 a\u00a0 good\u00a0 thing\u00a0 must\u00a0 surely\u00a0 be\u00a0 better.\u00a0 In\u00a0 fact\u00a0 it\u00a0 is\u00a0 far\u00a0 from\u00a0 certain <\/span>
\nthat\u00a0 this\u00a0 would\u00a0 be\u00a0 a\u00a0 desirable\u00a0 outcome.\u00a0 Intellectuals\u00a0 as\u00a0 a\u00a0 class\u00a0 are <\/span>
\nnotoriously\u00a0 prone\u00a0 to\u00a0 fine-sounding\u00a0 theoretical\u00a0 schemes\u00a0 that\u00a0 lead <\/span>
\nto\u00a0 catastrophe,\u00a0 such\u00a0 as\u00a0 Social\u00a0 Darwinism,\u00a0 Marxism\u00a0 or\u00a0 indeed <\/span>
\neugenics.<\/span>
\nBy\u00a0 analogy\u00a0 with\u00a0 animal\u00a0 breeding,\u00a0 people\u00a0 could\u00a0 no\u00a0 doubt\u00a0 be <\/span>
\nbred,\u00a0 if it were ethically acceptable, so\u00a0 as to\u00a0 enhance\u00a0 specific desired <\/span>
\ntraits.\u00a0 But\u00a0 it\u00a0 is\u00a0 impossible\u00a0 to\u00a0 know\u00a0 what\u00a0 traits would\u00a0 benefit\u00a0 society <\/span>
\nas a whole. The eugenics program, however reasonable it might seem, <\/span>
\nwas\u00a0 basically incoherent.<\/span><\/p>\n
\nCharles\u00a0 Davenport.\u00a0 He\u00a0 earned\u00a0 a\u00a0 doctorate\u00a0 in\u00a0 biology\u00a0 from\u00a0 Harvard <\/span>
\nand\u00a0 taught\u00a0 zoology\u00a0 at\u00a0 Harvard,\u00a0 the\u00a0 University\u00a0 of\u00a0 Chicago,\u00a0 and\u00a0 the <\/span>
\nBrooklyn\u00a0 Institute\u00a0 of\u00a0 Arts\u00a0 and\u00a0 Sciences\u00a0 Biological\u00a0 Laboratory\u00a0 at <\/span>
\nCold\u00a0 Spring\u00a0 Harbor\u00a0 on\u00a0 Long\u00a0 Island.\u00a0 Davenport\u2019s\u00a0 views\u00a0 on\u00a0 eugenics <\/span>
\nwere\u00a0 motivated\u00a0 by\u00a0 disdain\u00a0 for\u00a0 races\u00a0 other\u00a0 than\u00a0 his\u00a0 own:\u00a0 \u201cCan\u00a0 we <\/span>
\nbuild a\u00a0 wall high\u00a0 enough around this country so as to keep\u00a0 out these <\/span>
\ncheaper\u00a0 races,\u00a0 or will\u00a0 it\u00a0 be\u00a0 a\u00a0 feeble\u00a0 dam\u00a0 .\u00a0 .\u00a0 .\u00a0 leaving it to\u00a0 our\u00a0 descen\u00ad<\/span>
\ndants to abandon\u00a0 the country to the\u00a0 blacks,\u00a0 browns\u00a0 and\u00a0 yellows and <\/span>
\nseek\u00a0 an\u00a0 asylum in New\u00a0 Zealand?\u201d\u00a0 he wrote.9<\/span><\/p>\n
\naggression was performed by the Soviet scientist Dmitriy Belyaev. From <\/span>
\nthe same population of Siberian gray rats he developed two strains, one <\/span>
\nhighly sociable\u00a0 and\u00a0 the\u00a0 other\u00a0 brimming with\u00a0 aggression.\u00a0 For\u00a0 the tame <\/span>
\nrats, the parents of each generation were chosen simply by the criterion <\/span>
\nof how well they tolerated\u00a0 human presence.\u00a0 For the\u00a0 ferocious\u00a0 rats, the <\/span>
\ncriterion\u00a0 was\u00a0 how adversely they reacted\u00a0 to people.\u00a0 After many gener\u00ad<\/span>
\nations of breeding,\u00a0 the\u00a0 first strain was\u00a0 now so tame that when visitors <\/span>
\nentered\u00a0 the\u00a0 room\u00a0 where\u00a0 the\u00a0 rats\u00a0 were\u00a0 caged,\u00a0 the\u00a0 animals\u00a0 would\u00a0 press <\/span>
\ntheir\u00a0 snouts\u00a0 through\u00a0 the\u00a0 bars to\u00a0 be\u00a0 petted.\u00a0 The\u00a0 other\u00a0 strain\u00a0 could\u00a0 not <\/span>
\nhave\u00a0 been\u00a0 more\u00a0 different.\u00a0 The\u00a0 rats\u00a0 would\u00a0 hurl\u00a0 themselves\u00a0 screaming <\/span>
\ntoward\u00a0 the\u00a0 intruder,\u00a0 thudding\u00a0 ferociously\u00a0 against\u00a0 the\u00a0 bars\u00a0 of\u00a0 their <\/span>
\ncage.12<\/span><\/p>\n
\nN ew\u00a0 York\u00a0 Tim es, Ju ly\u00a0 2 5 ,\u00a0 2 0 0 6 ,\u00a0 www.nytimes.com\/2006\/07\/25\/health\/
\n25 ra ts.h tm l?p a g ew a n ted = a ll& _ r=0\u00a0 (accessed\u00a0 Sept.\u00a0 2 5 ,\u00a0 2 0 1 3 )<\/p>\n
\nto control\u00a0 aggression.\u00a0 Experiments with\u00a0 mice\u00a0 have\u00a0 shown that a\u00a0 large <\/span>
\nnumber of genes are involved in the trait, and the same is certainly true <\/span>
\nof\u00a0 people.\u00a0 Comparisons\u00a0 of\u00a0 identical\u00a0 twins\u00a0 raised\u00a0 together\u00a0 and\u00a0 sepa\u00ad<\/span>
\nrately\u00a0 show\u00a0 that\u00a0 aggression\u00a0 is\u00a0 heritable.\u00a0 Genes\u00a0 account\u00a0 for\u00a0 between <\/strong><\/span>
\n3 7%\u00a0 and 72%\u00a0 of the heritability<\/strong>, the variation\u00a0 of the trait in a\u00a0 popula\u00ad<\/span>
\ntion, according to various studies.\u00a0 But very few of the genes that under\u00ad<\/span>
\nlie\u00a0 aggression\u00a0 have\u00a0 yet\u00a0 been\u00a0 identified,\u00a0 in\u00a0 part\u00a0 because\u00a0 when\u00a0 many <\/span>
\ngenes control\u00a0 a\u00a0 behavior,\u00a0 each\u00a0 has\u00a0 so\u00a0 small\u00a0 an\u00a0 effect\u00a0 that\u00a0 it\u00a0 is\u00a0 hard\u00a0 to <\/span>
\ndetect.\u00a0 Most\u00a0 research\u00a0 has\u00a0 focused\u00a0 on\u00a0 genes\u00a0 that\u00a0 promote\u00a0 aggression <\/span>
\nrather than those at the other end of the\u00a0 behavioral\u00a0 spectrum.<\/span><\/p>\n
\nthat\u00a0 people\u00a0 the\u00a0 world\u00a0 over\u00a0 are\u00a0 interchangeable\u00a0 units\u00a0 is\u00a0 the\u00a0 idea\u00a0 that <\/span>
\nnational\u00a0 disparities\u00a0 in\u00a0 wealth\u00a0 arise\u00a0 from\u00a0 differences\u00a0 in\u00a0 intelligence. <\/span>
\nThe possibility should\u00a0 not be\u00a0 dismissed\u00a0 out of hand:\u00a0 where\u00a0 individu\u00ad<\/span>
\nals are concerned,\u00a0 IQ\u00a0 scores do correlate,\u00a0 on average,\u00a0 with economic <\/strong><\/span>
\nsuccess<\/strong>, so\u00a0 it is not unreasonable to inquire if the same\u00a0 might\u00a0 be true <\/span>
\nof countries.<\/span><\/p>\n
\nhave an extremely high correlation\u00a0 (83%)<\/strong>\u00a0 with economic growth\u00a0 per <\/span>
\ncapita\u00a0 and\u00a0 also\u00a0 associate\u00a0 strongly\u00a0 with\u00a0 the\u00a0 rate\u00a0 of economic\u00a0 growth <\/span>
\nbetween\u00a0 1950\u00a0 and\u00a0 1 9 9 0\u00a0 (64%\u00a0 correlation)<\/strong>.44<\/span><\/p>\n
\n know\u00a0 which\u00a0 way\u00a0 the\u00a0 arrow\u00a0 of\u00a0 causality\u00a0 may\u00a0 be\u00a0 pointing,\u00a0 whether<\/span>
\n higher\u00a0 IQ\u00a0 makes\u00a0 a\u00a0 nation\u00a0 wealthier\u00a0 or\u00a0 whether\u00a0 a\u00a0 wealthier\u00a0 nation<\/span>
\n enables\u00a0 its\u00a0 citizens\u00a0 to\u00a0 do\u00a0 better\u00a0 on\u00a0 IQ\u00a0 tests.\u00a0 The\u00a0 writer\u00a0 Roy\u00a0 Unz\u00a0 has<\/span>
\n pointed out from\u00a0 Lynn and Vanhanen\u2019s own data examples\u00a0 in\u00a0 which<\/span>
\n IQ\u00a0 scores\u00a0 increase\u00a0 10\u00a0 or more points\u00a0 in\u00a0 a generation\u00a0 when\u00a0 a\u00a0 popula\u00ad<\/span>
\n tion\u00a0 becomes\u00a0 richer,\u00a0 showing\u00a0 clearly\u00a0 that\u00a0 wealth\u00a0 can\u00a0 raise\u00a0 IQ<\/span>
\n scores\u00a0 significantly.\u00a0 East\u00a0 German\u00a0 children\u00a0 averaged\u00a0 90\u00a0 in\u00a0 1 9 6 7\u00a0 but<\/span>
\n 99\u00a0 in\u00a0 1984.\u00a0 In\u00a0 West\u00a0 Germany,\u00a0 which\u00a0 has\u00a0 essentially the\u00a0 same\u00a0 popu\u00ad<\/span>
\n lation,\u00a0 averages\u00a0 range\u00a0 from\u00a0 99\u00a0 to\u00a0 107.\u00a0 This\u00a0 17\u00a0 point\u00a0 range\u00a0 in\u00a0 the<\/span>
\n German\u00a0 population,\u00a0 from\u00a0 90\u00a0 to\u00a0 107,\u00a0 was\u00a0 evidently\u00a0 caused\u00a0 by\u00a0 the<\/span>
\n alleviation\u00a0 of poverty,\u00a0 not genetics.<\/span><\/p>\n
\nThe\u00a0 populations\u00a0 of China, Japan\u00a0 and Korea\u00a0 have consistently\u00a0 higher <\/span>
\nIQs\u00a0 than\u00a0 those\u00a0 of Europe\u00a0 and\u00a0 the\u00a0 United\u00a0 States,\u00a0 but\u00a0 their\u00a0 societies, <\/span>
\ndespite\u00a0 their\u00a0 many\u00a0 virtues,\u00a0 are\u00a0 not\u00a0 obviously\u00a0 more\u00a0 successful\u00a0 than <\/span>
\nthose of Europe and\u00a0 its outposts. Intelligence can\u2019t hurt, but it doesn\u2019t <\/span>
\nseem\u00a0 a\u00a0 clear\u00a0 arbiter\u00a0 of\u00a0 a\u00a0 population\u2019s\u00a0 economic\u00a0 success.\u00a0 W hat\u00a0 is\u00a0 it <\/span>
\nthen\u00a0 that determines\u00a0 the\u00a0 wealth\u00a0 or poverty of nations?<\/span><\/p>\n
\nin\u00a0 a\u00a0 few\u00a0 professions,\u00a0 notably\u00a0 moneylending\u00a0 and\u00a0 later\u00a0 ta x\u00a0 farming <\/span>
\n(give\u00a0 the prince\u00a0 his\u00a0 money\u00a0 up\u00a0 front,\u00a0 then\u00a0 extract the\u00a0 taxes\u00a0 due\u00a0 from <\/span>
\nhis\u00a0 subjects).\u00a0 Because\u00a0 of\u00a0 the\u00a0 strong\u00a0 heritability\u00a0 of\u00a0 intelligence,\u00a0 the<\/span>
\nUtah team calculates that 20 generations, a mere 5 0 0 years, would be <\/span>
\nsufficient for Ashkenazim to have developed an\u00a0 extra\u00a0 16 points of IQ <\/span>
\nabove that of Europeans. The Utah team assumes that the heritability <\/span>
\nof\u00a0 intelligence\u00a0 is\u00a0 0 .8 ,\u00a0 meaning\u00a0 that\u00a0 8 0 %\u00a0 of the\u00a0 variance,\u00a0 the\u00a0 spread <\/span>
\nbetween high and low values in a population, is due to genetics. If the <\/span>
\nparents of each generation have an\u00a0 IQ of just\u00a0 1\u00a0 point above the mean, <\/span>
\nthen\u00a0 average\u00a0 IQ\u00a0 increases\u00a0 by\u00a0 0 .8 %\u00a0 per\u00a0 generation.\u00a0 If\u00a0 the\u00a0 average <\/span>
\nhuman\u00a0 generation\u00a0 time\u00a0 in\u00a0 the\u00a0 Middle Ages was\u00a0 2 5\u00a0 years,\u00a0 then\u00a0 in\u00a0 20 <\/span>
\nhuman\u00a0 generations,\u00a0 or\u00a0 5 0 0\u00a0 years,\u00a0 Ashkenazi\u00a0 IQ\u00a0 would\u00a0 increase\u00a0 by <\/span>
\n2 0\u00a0 x\u00a0 0.8\u00a0 =\u00a0 16\u00a0 IQ\u00a0 points.<\/span><\/p>\n