The idea that some groups of people may be more intelligent than others is one of those hy

Theideathatsomegroupsofpeoplemaybemoreintelligentthanothersisoneofthosehypothesesthatd arenotspeakitsname.ButGregoryCochranis1tosayitanyway.Heisthat2bird,ascientistwhoworksindependently3anyinstitution.Hehelpedpopularizetheideathatsomediseasesnot4thoughttohaveabacterialcausewereactuallyinfections,whicharousedmuchcontr oversywhenitwasfirstsuggested.

5he,however,mighttr embleatthe6ofwhatheisabouttodo.Togetherwithanothertwoscientists,heispublishingapaperwhichnotonly7thatonegroupofhumanityismoreintelligentthantheothers,butexplainstheprocessthathasbroughtthisabout.Thegroupin8areaparticularpeopleoriginatedfromcentr alEurope.Theprocessisnaturalselection.

ThisgroupgenerallydowellinIQtest,912-15pointsabovethe10valueof100,andhavecontr ibuted11totheintellectualandculturallifeoftheWest,asthe12oftheirelites,includingseveralworld-renownedscientists,13heyalsosuffermoreoftenthanmostpeoplefromanumberofnastygeneticdiseases,suchasbreastcancer.Thesefacts,14avepreviouslybeenthoughtunrelated.Theformerhasbeen15socialeffects,suchasastr ongtr aditionof16ucation.Thelatterwasseenasa(an)17geneticisolation.Dr.Cochransuggeststhattheintelligenceanddiseasesareintimately18isargumentisthattheunusualhistoryofthesepeoplehas19emtouniqueevolutionarypressuresthathaveresultedinthis20ateofaffairs.

1._________

[A]selected[B]prepared[C]obliged[D]pleased