Poor memory/learning and crack addiction are genetic:

http://www.medicalnewstoday.com/index.php?newsid=6055
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Drug Addiction, Learning Share Common Brain Protein - 21 Feb 2004

DURHAM, N.C. -- Howard Hughes Medical Institute investigators at Duke
University Medical Center have linked a gene previously shown to play
a role in LEARNING AND MEMORY to the early manifestations of DRUG
ADDICTION in the brain.  Although scientists had previously speculated
that similar brain processes underlie aspects of learning and addiction,
the current study in mice is the first to identify a direct molecular
link between the two....

The researchers compared the activity of more than 36,000 genes in the
striatum of mice that had 'super-sensitivity' to cocaine due to a
genetic defect or prior cocaine exposure, with the gene activity in
the same brain region of normal mice. The genetic screen revealed six
genes with consistently increased or decreased activity in super-
sensitive versus normal mice, the team reported.....

Mice lacking PSD-95 take longer than normal mice to learn their way
around a maze. In other words, mice with normal amounts of PSD-95
appear less likely to become addicted and more likely to learn.....

'Drug abuse is a complex disorder and will therefore be influenced by
multiple genes,' Caron noted. ......
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There you have it.  All in one nice neat package.  Addictive behavior
and inability to learn (IQ-75 low intelligence) are *GENETIC*.
All this money poured into education trying to equalize outcomes
of DAFN LOOZerz, with genetically superior whites/Asians, is *WASTED*.

Supreme Court, 1954, Brown vs. DNA - a total LOOZer.

Go Bobo...Go Byron...Go Alberto.  The IQ-75_Monkey is on your back...