This article is silly.<p>Adoptive children are not compared to their 'classmates' who stay institutionalized, instead other children who won a genetic lottery, both literally and financially.<p>I'm an adoptive parent and have bio-children. The challenges my adoptive son has to overcome are enormous -- language, nurture, early-stage nutrition, family integration..But I bet he's doing far better on most developmental scales than his compatriots at the orphanage we adopted him from, a place that was so limited in experiences his four year old friends didn't know words like 'cone' or 'arrow'.
Why do lower-class children adopted into higher-class families behave more like lower-class children than higher-class children?<p>This seems to only a "paradox" if you believe in some kind of all-nurture no-nature blank-slate theory of human nature.