tikra tiesa jei esi gimes neturtingoje šeimoje JAV, turi kur kas mažiau galimybiu praturteti, nei gimes tokiu paciu Vakaru Europoje, Kanadoje ar Japonijoje. Gary S. Beckeris pripažista, kad neturtingas jaunuolis, jeigu jis dar juodaodis, greiciau mirs gatveje nuo narkotiku ar pateks i kalejima, nei prasimuš iš žemiausio visuomenes sluoksnio i aukštesni. Miltonas Friedmanas sako kad JAV aukštosios mokyklos del vienokiu ar kitokiu priezasciu nebaigia kas trecias studentas ir tuo paciu jis nukrenta i pati žemiausia visuomenes sluoksni.

Socialinio mobilumo galimybes tyres Kanados ekspertas Milesas Korakas, pasitelkes duomenis iš keliolikos šaliu, priejo prie išvados, kad blogiausias salygas pereiti iš žemesnio sluoksnio i aukštesni turi JAV gyventojai ! ! ! ! !

bl nepagalvokit kad rasistas bet teisybe kad baltas zmogus per amzius bus baltas.skaiciau,kad CHICAGO ! universitete,mokslininkui paskelbus,kad juodu protas menkesnis nei baltuju,kilo aziotazas.profesura nubalsavo palikti ji universitete,nes jis pasake tiesa.baltaodziai visada eina priekyje:atradejai,mokslininkai ,kulturos nesejai,uzkariautojai,isradejai .vien jav i islama atsiverte maziausiai 2 milijonai juodziu.o tai reiskia 2 milijonus bum bum

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There is no getting around certain large and troubling implications of black-white differences. The implications seem most troubling when you turn from the average differences and focus instead on the differences at the extreme -- when you contrast the two overlapping bell-shaped distribution curves and look at the proportions in each group scoring above and below certain levels. If you tell yourself that the top professional and managerial jobs in this country require an IQ of at least 115 or thereabouts, then you also have to tell yourself that only about 2.5 percent of blacks appear able to compete for those jobs. The comparable figure for whites would be about 16 percent. Total black population with IQs over 115: 800,000. Comparable figure for whites: about 30 million. If blacks had the same IQ distribution as whites, the black total would be over 5 million.

The data are even more depressing on the downside. An IQ in the 70-75 range, which many psychologists would label "borderline retarded," implies a life that is guaranteed to be short of opportunities. Very few students in that range will absorb much of what elementary schools teach, and virtually none will graduate from high school; few will succeed in finding and keeping good jobs. None will be admitted into the armed forces (required by law to screen out the lowest ten percent of the distribution). The bad news is that a substantial minority -- apparently more than one in five -- of American blacks have IQs below 75. Around one in twenty whites are below 75.

The black-white gap is 15 points when measured on the Wechsler tests, 18 on the Stanford-Binet. Both tests are, of course, normed so as to produce an average of 100, but the white average is a bit higher. On the Wechsler metric, whites and blacks average 102 and 87, respectively. On both tests, the gap between the races is almost exactly 1 SD (standard deviation). The gap of 1 SD has been observed since the earliest days of intelligence testing.