real, biological causes of crime in the criminal mind. It gave me insight into the many different genetic and biological problems that can lead to criminality. I also learned that there are many more causes than I had thought, such as vitamin deficiencies, excess hormones, hypoglycemia, fetal alcohol syndrome, and a host of others that make sense when I read them but were startling when I saw them in print. I also learned that these biological causes of crime have been slow to catch on in criminology circles, but they are becoming more accepted with time and research.

.Most of this information was new to me -- there was not a lot that I knew before reading this chapter. I knew about natural selection and Darwin's ideas on aggression, but did not put them together with this information. It was understandable that many of these theories have not been tested,...
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