Understanding is a fundamental concept in medical ethics. I want to discuss two contrasting senses in which medical treatments require understanding on behalf of the patient. The first of these is very familiar, and much discussed. The second is less so. Continue reading
Do genes make sex offenders? Are rapists and child molesters driven by biology or environment?
An article published last week in the International Journal of Epidemiology provides compelling evidence for a genetic component to risk of sexual offending. The study found that sons or brothers of convicted sex offenders are 4 to 5 times more likely than randomly selected males to be convicted of a sexual offence. Half-brothers of sex offenders, in contrast, are only twice as likely as controls to be convicted of such offences. The study estimates on this basis that genetic factors contribute about 40% of this variability in risk of offending. Environmental factors shared between siblings, such as parental attitudes, were estimated to contribute only 2% of this variability. Continue reading