Transcript Slide 1
Biogenic Causes of Crime
Chapter 6
Positivist School of Thought
Actions are determined by sociological, biological, or psychological causes,
not rational, free will choices – crime has an antecedent cause
Whereas classical criminologists assumed no inherent difference between
criminals and noncriminals, positivists assume those who commit crimes are
somehow different from those who do not
Positivism’s core is empiricism and determinism
Knowledge can be discovered only by means of observation & experience;
criminologists must use the scientific method to collect empirical facts to
determine the factors that lead to criminal behavior
Individual differences are rooted within factors beyond the control of individuals
– their behavior is determined by something other than their free-willed choice
Can justify intervention into offenders’ lives to “cure” them
Controversial – how much, & what kind, of intervention is allowed?
Early Positivism: Biogenic
Pioneered by Cesare Lombroso, Italian rationalist, physician, &
scientist who studied the connection between anatomy and psychiatry
Influenced by Charles Darwin’s ideas on evolution
Moved away from the classical “rational man” idea into the positivist “fact-
seeking” and “causality of behavior” ideas
Considered the father of criminology
Led to a shift in criminological thinking long-term
Multiple-factor explanation of crime
Scientific study rather than philosophical examinations of crime
Detailed analysis of all data
Biogenic theories fell out of favor after being associated with Nazi
regime, racism, and medical abuses; simultaneously, Sutherland raised
criminology to a respected subfield of sociology
Lombroso & “The Criminal Man”
Physical characteristics are predictive of criminal behavior and can
distinguish criminals from non-criminals
Some criminals possess atavistic (evolutionary throwback) features:
skulls larger or smaller than the local average, prominent frontal sinuses &
femoral muscles, large jaws & cheekbones, asymmetrical eyes & ears, “shifty” or
“hard-looking” eyes, ears larger or smaller or sticking out more than the local
average, flat noses among thieves, aquiline noses among murderers, fleshy lips
among rapists & murderers, thin lips among swindlers
Four types of criminal:
Born criminals – atavistic
Insane criminals – “idiots, imbeciles, paranoiacs, epileptics, alcoholics”
Occasional criminals – innate traits predispose, but opportunity must be present
for them to act
Criminals of passion – propelled to crime by an “irresistible force” like anger,
love, or honor
Lombroso & Ferrero and
“The Female Offender”
Female offenders’ physical traits:
Occipital irregularities, narrow foreheads, prominent
cheekbones, “virile” faces
Females had fewer degenerative features than men; prositutes
had the most because they offended against “female decency”
Female offenders lacked “maternal instincts” and “ladylike
qualities” that they were supposed to have biologically,
making them more vicious than male offenders
Post-Lombroso Bio-crime Research
Ferri – crime is explained by interactive effects of the physical, the
individual, and the social; recommended socialist reforms to correct the
problems that led to crime (later became fascist to prevent excessive
individualism)
Garofalo – society is a natural body, crimes are crimes against nature and
reflect failures of pity (concern for others’ well-being) or probity (concern
for others’ property); advocate of death penalty because he believed
criminality a permanent state
Goring – found that violent criminals had more strength, and burglars,
thieves, and arsonists were shorter & thinner, though his improved
statistical analyses found no other physiological differences between
offenders and nonoffenders
Goddard & Dugdale – studied genetics & crime via “pedigree studies”
that looked for families with higher than average amounts of deviant
behavior; fueled the eugenics movement
Problems with Early Biogenic Theories
Poor methods
Generalized from small study groups
Failed to consider more plausible explanations for differences they did
find – confused causality & correlation
Biological features are heavily influenced by environment: Poor diet, environmental
toxins, poor parenting, and poverty
Confused biological & behavioral features (e.g. tattoos)
Fit facts to theories & worldview (e.g. women deviating from prescribed
gender role; assumed behavior must be biological in nature)
Statistical issues
There is no physical characteristic that is associated with criminality
– though there are some neurological features that appear more
frequently with some kinds of criminals
Issues & Implications of Early
Bio-crime Theories
Eugenics
Sterilization
Death penalty
Bodily privacy & experimentation
Racism
Classism
Lack of focus on environmental factors (biological
antecedents) and social issues
Modern Biological Theories
Growing acceptance of biological factors, but it is difficult to overcome
anti-biological ideological bias
Most modern criminologists focusing on biological explanations are either
biosocial or biopsychological = nature PLUS nurture
Heritability coefficient – percent of variable determined by genetic structure
Biological factors no longer seen as destiny, but only as risk factors
E.g. heritability in psychological issues like conduct disorder and ADHD, which
are linked with criminal behavior
Difficulty with this perspective is its potential for abuse – danger of
discriminating against people with biological risk factors, even if they do
not commit crimes
Genetic, prenatal, and environmental biological impact is all considered
Genetic factors
Usually studied via twin or adoption research
Identical vs. fraternal; raised together or separated
There appear to be some genetic components to crime:
Adoptees with criminal biological parents are more likely to engage in
criminal behavior despite having prosocial adoptive families
Identical twins are more likely to share in deviant behavior than fraternal
twins or other siblings
Smoking and drinking behavior has a concordance rate of .70 for identical twins,
.30 for fraternal, .27 for full siblings, and .07 for half siblings (Clevland et al,
2005)
72% of variance in conduct disorders can be explained by genetics (Jaffee et al,
2005)
High levels of testosterone (a heritable trait) have been linked to
aggression; lowers neurological sensitivity to environmental stimuli
Also environmental – steroid “rage”
Environment and Biology
Nutrition – increased sugar intake can lead to hypoglycemia and
exacerbation of ADHD symptoms, sometimes causing aggressive behavior
Prenatal environmental toxin exposure
Nicotine can decrease the serotonin level of a fetus; interactive effects of father
absence (Gibson & Tibbetts, 2000)
Lead increase of 1 microgram per deciliter of prenatal blood associated with a
7.8% increase in arrests; lead stifles synapse formation, reducing travel of
neurotransmitters and lowers arousal of cerebral cortex (Wright et al, 2008)
Environmental toxins
One microgram increase in lead exposure from birth to age 6 associated with
5.2% increase in arrests (Wright et al , 2008)
Heavy metals, manganese, toxic waste, and synthetic hormones all linked to
behavioral changes including hyperactivity, impulsivity, aggression, and learning
disabilities
Toxins more likely in low-income areas
Neurotransmitters & Brain Arousal
Chemical messengers in the brain that allow neural cells to
communicate with each other
Four connected to crime: dopamine, norepinephrine, serotonin,
GABA
Low serotonin & dopamine or high norepinephrine: impulsive
violent acts, depression, suicide
Arousal theory: low arousal of the cerebral cortex can lead to risktaking and thrill-seeking behavior
Individuals with low EEG brain wave patterns are also at higher risk
for ADHD, have a higher threshold for threats of pain, slower
recovery to normal arousal levels, and low serotonin
Evolution
Evolutionary Theories
Cheater theory
Some males have evolved alternative reproductive strategies either
through environmental adaptation or inherited genetics, using force or
deception to impregnate females; same predisposition leads these men
to take advantage in other situations
Conditional adaptation theory
Antisocial behavior is a response to unstable or hostile environment; to
ensure reproduction, early puberty and early sexual activity, a pattern
also associated with antisocial behavior
Evolutionary expropriative theory
All humans have an equal genetic potential for criminal behavior; human
are all programmed to acquire resources to ensure reproduction. When
common strategies are inadequate or threatened, resources are
expropriated, leading to victimization of others
Policy Implications: Issues
Big issues before we can even get to policy: problems with causation
vs. correlation (e.g. IQ and crime); why do all children exposed to
certain biological phenomena (e.g. lead) not act the same way?
Must show that treatment is safe and effective, and addresses both
environment AND biology.
Depo-provera for sex offenders, only physiology
Drugs vs. cognitive-behavioral treatment
Tendency to stigmatize and science-orient what is essentially a social
construction: the law and conflict in behavior – crime is not a
biological concept
Prediction of criminal behavior by genetics (“crime-prone” individuals)
Crime as an unchangeable biological trait