> perhaps they gained genes from their parents that prompt both collecting books and pursuing more lucrative occupations Are you implying here that curiosity and intellectual abilities are genetically inheritable ? If so, what stops eugenics from being morally indefensible ?
IQ is heritable. There's over 50 years of psychometric research showing that.
> If so, what stops eugenics from being morally indefensible ?
The same thing that stops the reality of weapons being a defense of murder.
The saddest things about education today is that it purposefully suppresses information because it might be seen as justification for racism or sexism. The result is a generation that is largely ignorant about psychometrics and various other fields.